Year	Number
1990	16243
1991	17598
1992	19994
1993	23088
1994	25439
1995	30597
1996	26495
1997	27218
1998	28623
1999	30127
2000	31070
2001	31234
2002	30625
2003	29865
2004	28975
2005	28070
2006	27061
2007	25679
2008	23792
2009	21896
2010	20346
2011	18773
2012	16991
2013	15023
2014	12977
2015	10943
2016	9244
2017	7987
2018	7191
2019	6769
2020	6614
2021	6637
2022	10091