Year base year varies by country 1995 25.648664741548494 1996 28.174750387836017 1997 29.731041854023623 1998 31.996192881723996 1999 33.380964731651304 2000 34.92658900530485 2001 35.7787587160156 2002 37.35445364937572 2003 40.52110591385921 2004 43.254986862396535 2005 49.89589739761369 2006 53.46483196511416 2007 58.7557390675662 2008 70.90864198217182 2009 75.84064785504555 2010 100 2011 118.38716007324291 2012 127.55375073468738 2013 134.37134497426683 2014 138.35050494421475 2015 139.61704762481654 2016 139.60663716990206 2017 143.55369541168702 2018 146.92686533803675 2019 150.245717883169 2020 152.4814557789279 2021 157.54372206665352 2022 163.54844032202783