Year	Number
2008-01-01	30304590
2009-01-01	30919900
2010-01-01	31231410
2011-01-01	31683520
2012-01-01	32655590
2013-01-01	33292590
2014-01-01	34010120
2015-01-01	34929570
2016-01-01	35597680