Year	Number
1976	191073
1977	186639
1978	181741
1979	177866
1980	173035
1981	166411
1982	162602
1983	158915
1984	153010
1985	146637
1986	139270
1987	130663
1988	121505
1989	112780
1990	104688
1991	98316
1992	91507
1993	83082
1994	72875
1995	63054
1996	55428
1997	49140
1998	44545
1999	41374
2000	38920
2001	36834
2002	34835
2003	32672
2004	30831
2005	29464
2006	28293
2007	27395
2008	26631
2009	25879
2010	25150
2011	24682
2012	24585
2013	24651
2014	24581
2015	24126
2016	23323
2017	22493
2018	21150
2019	18869
2020	16843
2021	15572
2022	14539