Year	Number
1975	55510
1976	62720
1977	78970
1978	119180
1979	128770
1980	105256
1981	89990
1982	80588
1983	85043
1984	86673
1985	99303
1986	91214
1987	78894
1988	135866
1989	133496
1990	135634
1991	122328
1992	96158
1993	74500
1994	54895
1995	58197
1996	46908
1997	37369
1998	29018
1999	21393
2000	16090
2001	12625
2002	11233
2003	10360
2004	16114
2005	24441
2006	26445
2007	10012
2008	8596
2009	8397
2010	8412
2011	8086
2012	7981
2013	7736
2014	7476
2015	7359
2016	7229
2017	7056
2018	6943
2019	6757
2020	6665
2021	6778
2022	6653
2023	6551