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