Year base year varies by country 1990 41.277278276272 1991 42.7503460907571 1992 42.2041373038068 1993 59.0014822740334 1994 64.6766786653106 1995 67.9058506495496 1996 68.1846442855929 1997 72.3874169275451 1998 73.1589726002265 1999 72.3397629754093 2000 73.4476919895373 2001 75.261379119333 2002 77.3495007014633 2003 78.8600702769947 2004 78.9700704815515 2005 80.0418064431406 2006 81.8825078377419 2007 82.2843118827204 2008 86.3495986015222 2009 89.4612194986081 2010 90.0768800552929 2011 92.409010336673 2012 94.2038570193562 2013 97.0803333293012 2014 99.0357376646821 2015 99.3425421379959 2016 100 2017 101.025141160663 2018 102.941579625263 2019 104.145761213872 2020 104.880584583365 2021 107.900024893468 2022 113.658230574881 2023 116.756564795441