Year	Number
1977	776
1978	844
1981	1184
1982	1430
1983	1656
1984	1812
1985	1911
1987	2061
1988	2270
1989	2486
1990	2623
1991	2742
1992	2927
1993	3132
1994	3166
1995	3125
2011	7881
2012	8646
2013	8894
2014	9138
2015	9374
2016	9770
2017	9632
2018	9671
2019	9784
2020	9914
2022	8738