Year Index 1985 0.017 1986 0.022 1987 0.035 1988 0.058 1989 0.095 1990 0.153 1991 0.261 1992 0.434 1993 0.742 1994 1.6 1995 2.82 1996 5.08 1997 10.11 1998 17.15 1999 28.95 2000 40.24 2001 67.8 2002 87.94 2003 104.124 2004 113.863 2005 122.65 2006 134.49 2007 145.77 2008 160.44 2009 170.91 2010 181.85 2011 200.85 2012 213.23 2013 229.01 2014 247.72 2015 269.54 2016 292.54 2017 327.41 2018 393.88 2019 454.931 2020 518.622 2021 586.043 2022 662.232 2023 748.326 2024 838.125