Year	Number
1995	39240000
1996	39833000
1997	37315000
1998	33624000
1999	28803000
2000	31141000
2001	30679000
2002	31739000
2003	31412000
2004	33934000
2005	36173000
2006	38318000
2007	39379000
2008	39554000
2009	40624000
2010	39904000
2011	41304000
2012	43565000
2013	43611000
2014	45984000
2015	48345000
2016	52890000
2017	54962000
2018	57667000
2019	61397000
2020	31641000