Year base year varies by country 1990 8.30401834018095E-05 1991 0.000158380283108135 1992 0.00128628429772312 1993 0.0151637850479239 1994 0.202981709492298 1995 0.955930087091835 1996 1.73554130423621 1997 2.88250966286313 1998 4.00662950113019 1999 5.77416866098091 2000 8.50492402758071 2001 12.3525071156005 2002 17.9708136776259 2003 22.7807348811722 2004 26.407034740774 2005 32.0662911197061 2006 39.5909055185122 2007 48.2601656624603 2008 61.1898289587662 2009 71.7521511400144 2010 100 2011 121.626509936149 2012 140.355526503506 2013 157.181194706488 2014 179.225727788606 2015 198.04568292603 2016 215.731892191148 2017 256.854305759763 2018 326.005637512918 2019 384.083056427309 2020 428.031471431999 2021 486.003630713194 2022 558.461880974744 2023 626.77895167015