Year	Measure
1960	1546.26147
1961	1554.03491
1962	1675.87362
1963	1823.99523
1964	1855.08516
1965	1851.84356
1966	1902.75641
1967	1920.21212
1968	2045.82812
1969	2181.63231
1970	2418.21013
1971	2508.52092
1972	2627.3225
1973	2830.9468
1974	2730.43733
1975	2654.84873
1976	2866.97592
1977	2797.42192
1978	2893.0223
1979	3138.91614
1980	3067.01192
1981	2897.0094
1982	2830.22178
1983	2843.40557
1984	2953.68815
1985	3051.59706
1986	3061.58886
1987	3174.74539
1988	3204.56218
1989	3138.98349
1990	3240.11136
1991	3415.17308
1992	3245.59208
1993	3255.7847
1994	3234.49299
1995	3373.60357
1996	3580.4208
1997	3550.40417
1998	3606.61038
1999	3591.80947
2000	3570.49883
2001	3758.45757
2002	3773.65173
2003	3973.62433
2004	4007.5699
2005	4085.56765
2006	4078.81223
2007	4019.59017
2008	4032.14843
2009	3798.15117
2010	4051.19602
2011	3921.90051
2012	3886.76773
2013	3919.04442
2014	3763.3279
2015	3800.29942