Year	Percent
1976	43.47602
1977	52.10753
1978	117.04408
1979	200.82688
1980	246.28391
1981	148.3598
1982	134.78756
1983	164.92433
1984	170.02741
1985	219.38854
1986	285.35316
1987	370.43357
1988	416.2884
1989	507.59927
1990	602.51826
1991	607.07012
1992	625.61539
1993	617.08458
1994	628.43068
1995	654.73635
1996	802.4617
1997	987.4242
1998	1116.30873
1999	1220.87424
2000	1396.49415
2001	1473.01988
2002	1114.05926
2003	1038.61233
2004	1097.60629
2005	1369.9407
2006	2191.30526
2007	2302.4338
2008	2033.10105
2009	529.66285
2010	436.38498
2011	337.42166
2012	303.05161
2013	324.72393
2014	326.95204
2015	339.65236
2016	342.26893