2014
2012
2010
2008
2006
20
15
10
5
0
Money requested each year, $ billions
2014
2012
2010
2008
2006
20
15
10
5
0
Money requested each year, $ billions
2014
2012
2010
2008
2006
20
15
10
5
0
Money requested each year, $ billions
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
20
15
10
5
0
Money requested each year, $ billions