Year	Measure
1971	320.07711
1972	342.17613
1973	348.9188
1974	380.14216
1975	384.48177
1976	400.97835
1977	425.47412
1978	456.38739
1979	483.67775
1980	513.16792
1981	515.16725
1982	492.69843
1983	544.16615
1984	560.59737
1985	568.4494
1986	546.54585
1987	542.11587
1988	556.52923
1989	541.5855
1990	600.88109
1991	581.99773
1992	633.238
1993	603.61054
1994	639.86832
1995	636.85966
1996	655.47199
1997	666.83191
1998	717.98467
1999	734.08126
2000	753.24895
2001	787.99935
2002	792.11068
2003	807.63029
2004	844.78639
2005	823.00815
2006	858.33741
2007	877.71612
2008	905.79549
2009	870.36471
2010	966.33437
2011	911.90727
2012	940.97946
2013	945.35695
2014	943.60704