Year Index 1990 0.142 1991 0.314 1992 0.95 1993 3.5 1994 10.27 1995 10.292 1996 15.112 1997 20.508 1998 22.467 1999 24.133 2000 26.892 2001 28.6 2002 28.9 2003 30.358 2004 32.858 2005 37.017 2006 38.65 2007 41.817 2008 53 2009 56.392 2010 62.225 2011 67.042 2012 77.075 2013 83.725 2014 94.533 2015 100.092 2016 100.583 2017 105.233 2018 113.283 2019 122.842 2020 132.175 2021 142.122 2022 152.018 2023 162.54 2024 174.111