Year	Number
1972	30814
1973	30344
1974	30755
1977	33860
1987	53393
1988	60539
1989	54780
1990	55755
1991	55873
1992	58751
1993	68088
1994	67487
2013	79718
2014	80449
2015	81337
2016	82407
2017	83254
2018	83756
2019	83636
2020	85579
2022	87608