Year	DesMoines	SanFrancisco
1995	56	51
1996	37.5	55.3
1997	37.2	55.7
1998	56	48.7
1999	54.3	56.2
2000	63.3	57.2
2001	54.7	49.5
2002	60.6	61
2003	70.6	51.4
2004	53.7	55.8
2005	52.9	53
2006	74.9	58.1
2007	44.4	54.2
2008	40.3	53.4
2009	44.4	49.9
2010	71	53.8