Year	Number
1980	115285
1981	122059
1982	126014
1983	136045
1984	146734
1985	146557
1986	152996
1987	158393
1988	155027
1989	153101
1990	151935
1991	149163
1992	188357
1993	154774
1994	152708
1995	156790
1996	163518
1997	114389
1998	96845
1999	104252
2000	124362
2001	104658
2002	100653
2003	106972
2004	110278
2005	114034
2006	111771
2007	118148
2008	95671
2009	90473
2010	92162
2011	84674
2012	95547
2013	92505
2014	100044
2015	117956
2016	133335
2017	154777