Best datatype to store betting odds? I have a lot of soccer betting odds (hundreds per match and thousands of matches), for example:

&lt;_10Bet_Home_Home&gt;8.00&lt;/_10Bet_Home_Home&gt;
&lt;_10Bet_Home_Away&gt;1.39&lt;/_10Bet_Home_Away&gt;
&lt;_10Bet_Home_Draw&gt;4.50&lt;/_10Bet_Home_Draw&gt;
&lt;Bet_At_Home_Home&gt;7.50&lt;/Bet_At_Home_Home&gt;
&lt;Bet_At_Home_Away&gt;1.40&lt;/Bet_At_Home_Away&gt;
&lt;Bet_At_Home_Draw&gt;4.30&lt;/Bet_At_Home_Draw&gt;
&lt;Bet365_Home&gt;7.50&lt;/Bet365_Home&gt;
&lt;Bet365_Away&gt;1.40&lt;/Bet365_Away&gt;
&lt;Bet365_Draw&gt;4.50&lt;/Bet365_Draw&gt;
&lt;Bwin_Home&gt;7.00&lt;/Bwin_Home&gt;
&lt;Bwin_Away&gt;1.45&lt;/Bwin_Away&gt;
&lt;Bwin_Draw&gt;4.25&lt;/Bwin_Draw&gt;
&lt;MyBet_Home&gt;7.50&lt;/MyBet_Home&gt;
&lt;MyBet_Away&gt;1.43&lt;/MyBet_Away&gt;
&lt;MyBet_Draw&gt;4.50&lt;/MyBet_Draw&gt;
&lt;NordicBet_Home&gt;7.85&lt;/NordicBet_Home&gt;
&lt;NordicBet_Away&gt;1.40&lt;/NordicBet_Away&gt;
&lt;NordicBet_Draw&gt;4.50&lt;/NordicBet_Draw&gt;
....


What is the best datatype to store them? I need to occupy less storage as possible but also be efficient with sums, means etc.

They don't have a theoretical max value but I don't think they'll go above 100... Decimal(4,2) unsigned? 

I know the question may be silly but I'm looking for a confirm from database experts...
I would use Decimal(4,2) if you are confident that 99.99 is the max value.  Decimal(4,2) will consume 2 bytes while decimal(5,2) will consume 3 bytes but give you a safety net if the value were to exceed 99.99; it's up to you how confident your data set will stay under 100.