Year	Number
1988	6619400
1989	6875100
1990	7207400
1991	7426600
1992	7683100
1993	8215000
1994	9417300
1995	9985700
1996	10701700
1997	10884300
1998	11586400
1999	12797200
2000	13384562
2001	12936051
2010	20932847.35207754
2011	20587558.889797587
2012	20924089.307821922
2013	19181953.6
2014	21690361.952764966
2017	26423477
2018	29543913.884630393
2019	26839242.579338048
2020	7717842.031
2021	7031655.584000001