+3,917
10,000
8,000
6,000
4,000
2,000
2,000
4,000
6,000
8,000
10,000
12,000
+14,000
2018
-5,501
2000
-9,108
2001
-6,962
2002
-4,691
2003
-920
2004
-2,021
2005
-2,151
2006
+4,599
2007
+6,422
2008
+14,963
2009
+13,599
2010
+12,029
2011
+11,475
2012
+6,574
2013
+7,233
2014
+5,654
2015
+5,132
2016
+3,831
2017
+3,917
2018
