Year Index (Units) 1980 14.677 1981 16.869 1982 19.172 1983 21.301 1984 23.429 1985 25.875 1986 28.544 1987 31.546 1988 34.770 1989 37.963 1990 41.632 1991 45.524 1992 48.193 1993 49.781 1994 52.065 1995 56.676 1996 60.552 1997 62.163 1998 66.301 1999 72.204 2000 74.820 2001 76.176 2002 78.009 2003 81.036 2004 87.632 2005 93.316 2006 100.000 2007 107.205 2008 117.858 2009 125.701 2010 134.897 2011 146.751 2012 159.795 2013 170.624 2014 183.164 2015 194.896 2016 206.427 2017 217.657 2018 230.243 2019 242.848 2020 256.563 2021 270.822 2022 287.477 2023 313.396 2024 342.542 2025 363.437 2026 384.262 2027 405.396 2028 427.693 2029 451.216