Year	Measure
2000	32.67866
2001	30.751
2002	30.39488
2003	29.7862
2004	33.51867
2005	36.7149
2006	34.88521
2007	39.1319
2008	39.26841
2009	42.68393
2010	44.32112
2011	47.52519
2012	49.51602
2013	48.46315
2014	51.44082