Year	Number
1988	2808
1989	2807
1990	2758
1991	2756
1992	2807
1993	2860
1994	2920
1995	2945
1996	2950
1997	2943
1998	2916
1999	2890
2000	2875
2001	2859
2002	2881
2003	2895
2004	2899
2005	2902
2006	2898
2007	2901
2008	2840
2009	2774
2010	2714
2011	2694
2012	2663
2013	2624
2014	2561
2015	2498
2016	2436
2017	2354
2018	2314
2019	2270
2020	2240
2021	2198
2022	2164