Year base year varies by country 1990 32.5090731104143 1991 32.7247673213507 1992 32.7169666736446 1993 34.7304323688293 1994 50.8405148426557 1995 56.4552344612454 1996 59.2684465421053 1997 61.5926433827962 1998 64.910861671886 1999 64.4072105526693 2000 65.4383811278654 2001 69.9379037957584 2002 73.1425546089055 2003 75.5402558268221 2004 73.649213151921 2005 74.6076142463678 2006 75.6219333066226 2007 77.9575541086092 2008 82.1461616374003 2009 83.1383059711316 2010 84.3988638681401 2011 89.2174655047789 2012 88.8569391891795 2013 91.4131137966907 2014 95.4419935384241 2015 100 2016 98.820167564343 2017 97.79078036229 2018 99.4355982794189 2019 101.40775669633 2020 103.261878975731 2021 107.320206480104 2022 109.558797152853 2023 112.281527294194