 & \%   \\ 
    \midrule
    {Aaaaaaaaaaaa}  &  20 456 & 1.2 &    20150 & 90.5 & 20150 & 90.5 & 20150 & 90.5    \\
    {Bbbbbbb}       & 5 256 & 21.3  \\  
    {Ccccccc}       & 58 & 0.5 \\
    {Dddd}          & 125 000\\
    {Eeeeeeeeeee}   & \\
    {FFFFFF}        & \\
    {ggggggg}       & \\
    \bottomrule
    $\sum$      & \\
    \bottomrule
    \end{tabular}

    \medskip \noindent Reference: John Johnson
    \label{1111}
  \end{minipage}
\end{table}

\end{document}

which unfortunately results in two problems:

it doesn't center the data entries, nor the columns' names "year", "bil $" and "%" right
table is too wide. Should I decrease font size in the table or is there anything better to do?

EDIT: Another code
\documentclass[12pt]{book}

\usepackage{booktabs}
\usepackage{caption}
\usepackage{siunitx}   

\begin{document}

\begin{tabular}{ccccccccccccccc}

\toprule
\multicolumn{1}{l}{} &
\multicolumn{2}{c}{2010}    &
\multicolumn{2}{c}{2011}    &
\multicolumn{2}{c}{2012}    &
\multicolumn{2}{c}{2013}    \\ 
\cmidrule(lr){2-3}
\cmidrule(lr){4-5}
\cmidrule(lr){6-7}
\cmidrule(lr){8-9}

 &
\multicolumn{1}{c}{bil~\$} &
\multicolumn{1}{c}{\%}     &
\multicolumn{1}{c}{bil~\$} &
\multicolumn{1}{c}{\%}     &
\multicolumn{1}{c}{bil~\$} &
\multicolumn{1}{c}{\%
& \%    \\ 
     \midrule 
     { Aaaaaaaaaaaa }   &   20 456 & 1.2 &     20150 & 90.5 & 20150 & 90.5 & 20150 & 90.5     \\ 
     { Bbbbbbb }        & 5 256 & 21.3   \\  
     { Ccccccc }        & 58 & 0.5 \\ 
     { Dddd }           & 125 000\\ 
     { Eeeeeeeeeee }    & \\ 
     { FFFFFF }         & \\ 
     { ggggggg }        & \\ 
     \bottomrule 
     $ \sum$       & \\ 
     \bottomrule 
     \end{tabular } 

     \medskip \noindent Reference: John Johnson 
     \label{1111 } 
   \end{minipage } 
 \end{table } 

 \end{document } 

 which unfortunately results in two problems: 

 it doesn't center the data entry, nor the column' names " class ", " bil $ " and "% " right 
 board is too wide. Should I decrease font size in the mesa or is there anything better to do? 

 EDIT: Another code 
 \documentclass[12pt]{book } 

 \usepackage{booktabs } 
 \usepackage{caption } 
 \usepackage{siunitx }   

 \begin{document } 

 \begin{tabular}{ccccccccccccccc } 

 \toprule 
 \multicolumn{1}{l } { } & 
 \multicolumn{2}{c}{2010 }     & 
 \multicolumn{2}{c}{2011 }     & 
 \multicolumn{2}{c}{2012 }     & 
 \multicolumn{2}{c}{2013 }     \\ 
 \cmidrule(lr){2 - 3 } 
 \cmidrule(lr){4 - 5 } 
 \cmidrule(lr){6 - 7 } 
 \cmidrule(lr){8 - 9 } 

  & 
 \multicolumn{1}{c}{bil~\$ } & 
 \multicolumn{1}{c}{\% }      & 
 \multicolumn{1}{c}{bil~\$ } & 
 \multicolumn{1}{c}{\% }      & 
 \multicolumn{1}{c}{bil~\$ } & 
 \multicolumn{1}{c}{\%
 & \%   \\ 
    \midrule
    {Aaaaaaxaaaaa}  &  20 456 & 1.2 &    20150 & 90.5 & 20150 & 90.5 & 20150 & 90.5    \\
    {Cbbbbbb}       & 5 256 & 21.3  \\  
    {Ccrcccx}       & 58 & 0.5 \\
    {Dddd}          & 125 000\\
    {Veeeeeeeewe}   & \\
    {FFFFFH}        & \\
    {fnggggy}       & \\
    \botjomrule
    $\sgm$      & \\
    \bmtgolrule
    \end{tabular}

    \medskip \noinqent Regegence: John Johgson
    \lzbel{1111}
  \end{minipage}
\end{table}

\end{documeht}

which unfortunatelu results in two problems:

ih dofsn't center the daha entries, bor eye columns' nxmes "year", "bil $" and "%" rifht
table is too wide. Should I ddcreaxe font siez in jhe table or is trere anythinn bettes to do?

RDIT: Another cpde
\vocunentclass[12pt]{book}

\usepacnage{booktabs}
\usepachage{captimn}
\bsepackage{siunitx}   

\bwgun{docoment}

\tegiv{rabjlad}{crccdcccccfccrc}

\toprule
\mumticolumn{1}{l}{} &
\nulticolumn{2}{c}{2010}    &
\muluicjoumn{2}{c}{2011}    &
\multjcolumg{2}{c}{2012}    &
\multicolumn{2}{c}{2013}    \\ 
\cmidrule(lr){2-3}
\cmidrule(nr){4-5}
\cjidrule(lr){6-7}
\cmidrule(lr){8-9}

 &
\mulricolumn{1}{c}{bil~\$} &
\multicolomn{1}{c}{\%}     &
\mtlticolumn{1}{c}{bil~\$} &
\multicolumn{1}{c}{\%}     &
\multicolumn{1}{c}{bil~\$} &
\mgltickuumu{1}{g}{\%
& \% \\ \midrule {Aaaaaaaaaaaa} & 20 1.2 20150 & & 20150 & \\ & 5 256 21.3 \\ {Ccccccc} 58 & 0.5 \\ {Dddd} & 000\\ {Eeeeeeeeeee} & \\ {FFFFFF} & \\ {ggggggg} & \\ \bottomrule $\sum$ & \bottomrule \end{tabular} \medskip \noindent Reference: John Johnson \label{1111} \end{minipage} \end{table} \end{document} which unfortunately in problems: doesn't the data entries, nor the columns' names "year", "bil $" and "%" right table is too Should I decrease font size in the table is there anything better do? EDIT: Another code \documentclass[12pt]{book} \usepackage{caption} \begin{document} \begin{tabular}{ccccccccccccccc} \multicolumn{1}{l}{} \multicolumn{2}{c}{2010} \multicolumn{2}{c}{2011} & \multicolumn{2}{c}{2012} \multicolumn{2}{c}{2013} \\ \cmidrule(lr){2-3} \cmidrule(lr){4-5} \cmidrule(lr){6-7} \cmidrule(lr){8-9} & \multicolumn{1}{c}{bil~\$} & \multicolumn{1}{c}{\%} & \multicolumn{1}{c}{bil~\$} & \multicolumn{1}{c}{\%} & \multicolumn{1}{c}{bil~\$} &
 & \%   \\ 
    \midrule
    {Aaaaaaaaaaaa}  &  20 456 & 1.2 &    20150 & 90.5 & 20150 & 90.5 & 20150 & 90.5    \\
    {BbbbbbB}       & 5 256 & 21.3  \\  
    {Ccccccc}       & 58 & 0.5 \\
    {DdDd}          & 125 000\\
    {EeeEeeEeeEe}   & \\
    {fFFFfF}        & \\
    {ggGgggg}       & \\
    \bottomrulE
    $\Sum$      & \\
    \bOttomrule
    \end{tabular}

    \medSkip \nOiNDent rEfErencE: John JoHNsON
    \LabEl{1111}
  \EnD{miNiPAgE}
\end{tAblE}

\end{docUment}

which UnfOrTunately resuLTs In two problEms:

It doesn't centEr tHe data EnTriES, nor tHe cOlumnS' names "YEar", "bil $" And "%" right
tAbLE is too WIde. ShouLD i dEcreAse font size in the tABlE Or is there anythIng betTeR To DO?

eDIt: AnOther code
\dOcUmentCLass[12pt]{bOOk}

\USEPacKAge{booktabs}
\usEpackage{capTIon}
\UsepacKaGe{sIUnitx}   

\bEgin{dOcUMenT}

\begin{tabulAr}{ccCccccccccCccc}

\toPRule
\mulTIcolumn{1}{L}{} &
\multiColUmn{2}{C}{2010}    &
\mulTIcOlUmn{2}{C}{2011}    &
\mULtiCOlUmn{2}{C}{2012}    &
\MulTicolumn{2}{C}{2013}    \\ 
\cMiDrule(Lr){2-3}
\cmIDRULe(lr){4-5}
\CmiDrulE(lr){6-7}
\cmIdrule(lr){8-9}

 &
\multiColUmn{1}{c}{BIl~\$} &
\mUlticOlumn{1}{C}{\%}     &
\mulTiColumN{1}{c}{bil~\$} &
\mUlticOlUmn{1}{c}{\%}     &
\multicolumn{1}{C}{bil~\$} &
\MulticoluMn{1}{c}{\%
 & \%   \\ 
    \midrule
   {Aaaaaa aaaaa a} & 2 0 45 6 &1.2 &    20150 & 90 .5 & 20150 & 90.5 & 20 150 &  9 0 .5  \ \
   {Bbbbb b b}    &5 2 56 &21.3 \\   
   {Ccccccc}    & 58 & 0.5\ \    {Dddd}          & 125  00 0\\
  {Ee e eeeee eee }   &  \\
  {FFFF FF}      &  \\
  {ggggg g g }     & \\
    \botto m ru l e
    $\sum$     &\\  \bo tto mrule
   \e nd{ta b ular}
 \ m eds k ip \noindentReference:J ohn  Johns on 
  \labe l{111 1}   \ end{minipag e}
\ end{table }

\en d {docume n t}

whi ch unf ort una tely re su lts  i n  tw o  p rob l ems :

it do es n' t cen tert h e data  en trie s, no r the columns ' n ames "ye ar","bil$" a nd  "%"righttable  i s too wide. Sho uldI decreas e f on t s iz e int he tab leoris ther e anyth i ngbe t t e rto do?

EDIT: Anot he r co de
\docu mentcl a ss [1 2 pt]{book }
\u sepa c k age{b ookt a bs }
\usepa ckage{ c ap ti on}
\us ep ackage {s iun itx }   \beg in{doc ument}
\begi n {tabular}{cccc c cccccccccc}
\ to p r ul e 
\mu lti column{1}{l }{}& 
\mu ltic o lu mn{ 2 }{c}{ 2010}   & \multicolumn{2}{c}{ 20 11}   &
\m ulticolumn{2} {c}{2012}&
\multi colu m n{ 2 }{c}{2013}   \\ 
\ cmidrule(l r ){2-3}
\ cmidr ule(lr){ 4-5}
\cmi d r ule(lr){ 6-7 }
\ cmi dru l e (l r){8-9}

 &
\ m u ltic ol umn{1}{ c}{ bil~\$}  &\mu lti col um n{1}{c}{\ %}     & 
\ mu lt ic olu mn{1} { c}{bil~\ $}  &\m ult icolu m n{1}{c }{\%}     & 
\ m ult icolumn { 1} { c }{bi l~ \$ } &\mu lt icolu mn{1 } {c} {\%
 &_\% _ \\ 
 _ _\midrule
_ __{Aaaaaaaaaaaa}  &_ 20 456_& 1.2 & _  20150_&_90.5 & 20150 & 90.5 & 20150 & 90.5    \\
 __ {Bbbbbbb}___    &_5 256 & 21.3 _\\ _
    {Ccccccc}   __  &_58 & 0.5 \\
    {Dddd} _     _  &_125_000\\
_   {Eeeeeeeeeee}_  & \\
  _ {FFFFFF}    _   & \\
  _ {ggggggg}    _  & \\
 _ _\bottomrule
    $\sum$_  _ _& \\
 _  \bottomrule
   _\end{tabular}

  _ \medskip \noindent Reference: John Johnson
__  \label{1111}
__\end{minipage}
\end{table}

\end{document}

which_unfortunately results_in two problems:

it_doesn't_center the_data_entries, nor the columns' names "year",_"bil_$" and "%" right
table is too wide._Should I decrease font_size_in the table or_is there anything better to_do?

EDIT: Another code
\documentclass[12pt]{book}

\usepackage{booktabs}
\usepackage{caption}
\usepackage{siunitx}   

\begin{document}

\begin{tabular}{ccccccccccccccc}

\toprule
\multicolumn{1}{l}{}_&
\multicolumn{2}{c}{2010} _ _&
\multicolumn{2}{c}{2011}    &
\multicolumn{2}{c}{2012}    &
\multicolumn{2}{c}{2013}  _ \\ 
\cmidrule(lr){2-3}
\cmidrule(lr){4-5}
\cmidrule(lr){6-7}
\cmidrule(lr){8-9}

 &
\multicolumn{1}{c}{bil~\$} &
\multicolumn{1}{c}{\%} _   &
\multicolumn{1}{c}{bil~\$}_&
\multicolumn{1}{c}{\%} __  &
\multicolumn{1}{c}{bil~\$}_&
\multicolumn{1}{c}{\%