YEAR,CH,YDH,WH
2001,263463.3,276965,1321154.3
2002,266803.9,279402.7,1329487.9
2003,268854.1,280660.7,1384162.6
2004,271333.8,282114.5,1460684.6
2005,276032.9,283768.3,1541269.3
2006,277991.1,285698,1563967.6
2007,280386.3,286234.7,1478029.8
2008,274551.2,284180.1,1428376.3
2009,276936.3,290148.6,1511004.3
2010,280270.2,292081.1,1540454.7
2011,281799.5,293020.3,1566691.2
2012,286450.6,293982.2,1648874.2
2013,294316.7,292079.8,1689069.3
2014,286746.2,287627.7,1730443.5
2015,287690.6,290932.5,1724401.1