Year Index 1989 52.084 1990 54.009 1991 56.484 1992 57.309 1993 58.107 1994 58.877 1995 60.389 1996 62.287 1997 69.354 1998 69.959 1999 71.444 2000 73.671 2001 75.587 2002 76.984 2003 79.212 2004 80.556 2005 85.422 2006 92.19 2007 94.819 2008 100.963 2009 102.157 2010 106.54 2011 108.71 2012 109.26 2013 109.93 2014 109.33 2015 106.71 2016 106.74 2017 107.547 2018 105.344 2019 107.417 2020 109.53 2021 111.685 2022 113.882 2023 116.123 2024 118.408