Year	Number
1988	191287
1990	202978
1992	255508
1993	233931
1994	218047
1996	219662
1997	208798
1998	190996
1999	191794
2000	189828
2001	197410
2002	190897
2003	170674
2004	163966
2005	151120
2006	135904
2007	113237
2008	92841
2009	74054
2010	38805
2011	38822
2012	38302
2013	23539
2014	20572
2015	32541
2016	39567