anchor.diff: -Year,Category,State,factor,n
  +year,category,state,factor,n
   2008,spend >30% on housing,Maryland,count,553000
   2009,spend >30% on housing,Maryland,count,573000
   2010,spend >30% on housing,Maryland,count,566000
  
positive.code: 2010,spend >30% on housing,United States,pct,41
  2011,spend >30% on housing,United States,pct,40
  2012,spend >30% on housing,United States,pct,38
  2008,spend >30% on housing,United States,rank,NULL
  2009,spend >30% on housing,United States,rank,NULL
  2010,spend >30% on housing,United States,rank,NULL
  2011,spend >30% on housing,United States,rank,NULL
  2012,spend >30% on housing,United States,rank,NULL
  2008,children in poverty,United States,count,13241000
  2009,children in poverty,United States,count,14657000
  2010,children in poverty,United States,count,15749000
  
negative.code: 2010,teens not attending school,United States,pct,9
  2011,teens not attending school,United States,pct,8
  2012,teens not attending school,United States,pct,8
  2008,teens not attending school,United States,rank,0
  2009,teens not attending school,United States,rank,0
  2010,teens not attending school,United States,rank,0
  2011,teens not attending school,United States,rank,0
  2012,teens not attending school,United States,rank,0
  2008,spend >30% on housing,Virginia,count,688000
  2009,spend >30% on housing,Virginia,count,712000
  2010,spend >30% on housing,Virginia,count,689000
  