Year	Number
1995	16100000
1996	19085000
1997	23660000
1998	25499000
1999	29215000
2000	37226000
2001	40129000
2002	41737000
2003	42857000
2004	44974000
2005	45762000
2006	47733000
2007	52271000
2008	51336000
2009	47573000
2010	49006000
2011	49969000
2012	47185000
2013	48345000
2014	51168000
2015	55858000
2016	57587000
2017	59238000
2018	57668000
2019	60021000
2020	21608000