anchor.diff:  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,spend >30% on housing,United States,rank,0
  +2009,spend >30% on housing,United States,rank,0
  +2010,spend >30% on housing,United States,rank,0
  +2011,spend >30% on housing,United States,rank,0
  +2012,spend >30% on housing,United States,rank,0
   2008,children in poverty,United States,count,13241000
   2009,children in poverty,United States,count,14657000
   2010,children in poverty,United States,count,15749000
  
positive.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,NULL
  2009,teens not attending school,United States,rank,NULL
  2010,teens not attending school,United States,rank,NULL
  2011,teens not attending school,United States,rank,NULL
  2012,teens not attending school,United States,rank,NULL
  2008,spend >30% on housing,Virginia,count,688000
  2009,spend >30% on housing,Virginia,count,712000
  2010,spend >30% on housing,Virginia,count,689000
  
negative.code: 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
  