Year	Number
1975	87.795992714
1976	88.4942319369
1977	89.1924711597
1978	89.8907103825
1979	90.5889496053
1980	91.2871888282
1981	91.985428051
1982	92.6836672738
1983	93.3819064967
1984	94.0801457195
1985	94.7783849423
1986	95.4766241651
1987	96.174863388
1988	96.8731026108
1989	97.5713418336
1990	98.2240437158
1991	98.9222829387
1992	99.6205221615
1993	99.9544626594
1994	103.2391360916
1995	106.5238095238
1996	109.8128545407
1997	113.1018995576
1998	116.3909445746
1999	119.6799895915
2000	103.8797814208
2001	106.9344262295
2002	109.9890710383
2003	113.043715847
2004	116.0983606557
2005	119.1530054645
2006	122.2076502732
2007	125.262295082
2008	128.3169398907
2009	131.3715846995
2010	134.4262295082
2011	130.5100182149
2012	131.693989071
2013	132.9690346084
2014	110.5646630237
2015	110.9289617486
2016	110.4735883424
2017	141.1657559199
2018	141.1657559199
2019	141.1657559199
2020	141.1657559199