Year | China | East | Central | West |
1998 | 0.7223 | 0.82479 | 0.6394 | 0.61739 |
1999 | 0.7212 | 0.82775 | 0.63887 | 0.61799 |
2000 | 0.71543 | 0.82934 | 0.63977 | 0.61493 |
2001 | 0.71659 | 0.83297 | 0.64383 | 0.61237 |
2002 | 0.71153 | 0.82272 | 0.64683 | 0.6034 |
2003 | 0.71167 | 0.82567 | 0.64733 | 0.6037 |
2004 | 0.71411 | 0.82862 | 0.65035 | 0.60589 |
2005 | 0.71622 | 0.83157 | 0.65338 | 0.60653 |
2006 | 0.7192 | 0.83452 | 0.65642 | 0.60942 |
2007 | 0.72218 | 0.83747 | 0.65947 | 0.61232 |
2008 | 0.7254 | 0.84042 | 0.66188 | 0.6146 |
2009 | 0.7286 | 0.84277 | 0.66604 | 0.61753 |
2010 | 0.73116 | 0.84632 | 0.6687 | 0.62111 |
2011 | 0.73416 | 0.84927 | 0.67179 | 0.62407 |
2012 | 0.73718 | 0.85221 | 0.6749 | 0.62704 |
2013 | 0.74019 | 0.85516 | 0.67801 | 0.63003 |
2014 | 0.74228 | 0.85782 | 0.68113 | 0.63303 |
2015 | 0.74637 | 0.86104 | 0.68427 | 0.63472 |
Average | 0.72532 | 0.83891 | 0.65902 | 0.617 |