Year	Number
1996	11065.53
1997	11075.57
1998	11369.23
1999	11933.1
2000	12984.35
2001	14359.62
2002	15613.41
2003	16722.41
2004	18877.97
2005	20341.91
2006	22113.06
2007	21937.95
2008	23784.03
2009	23693.13
2010	24675.84
2011	25560.97
2012	27660.19
2013	29438.53
2014	30848.34
2015	32470.81
2016	33912.65
2017	33576.35
2018	34972.82
2019	34816.33
2020	36766.63