Year	Number
1997	23702
2000	22250
2001	22280
2003	22424
2008	24208
2009	24069
2010	24082
2011	23298
2012	23452
2013	23471
2014	23314
2015	23329
2016	24082
2017	24165
2018	24008
2019	23937
2020	23534
2021	23289
2022	23390