13,350
2019
2,000
4,000
6,000
8,000
10,000
12,000
2,000
1991
2,200
1992
2,500
1996
2,650
1998
3,250
1999
3,600
1999
4,000
2000
4,500
2000
5,000
2001
5,700
2002
6,200
2003
6,700
2004
7,185
2005
7,570
2006
7,955
2006
8,000
2007
8,500
2013
9,200
2015
9,900
2016
11,000
2017
12,200
2018
13,350
2019