1,588
X
200
400
600
800
1,000
1,200
1,400
1,600
1,800
2,000
2,200
855
2007
783
360
1,028
2008
904
421
1,134
2009
1,132
491
1,272
2010
1,192
655
1,399
2011
1,201
679
1,530
2012
1,299
770
1,656
2013
1,391
921
1,850
2014
1,588
1,148
2,221
2016
2,064
1,419
2,358
2017
2,155
1,441
2,392
2018
2,293
1,588
