Year Index (Units) 1983 14.518 1984 15.155 1985 15.813 1986 16.649 1987 17.147 1988 18.441 1989 18.775 1990 20.444 1991 21.608 1992 22.682 1993 23.774 1994 25.325 1995 30.062 1996 31.650 1997 33.337 1998 40.609 1999 45.968 2000 50.552 2001 55.785 2002 64.049 2003 69.453 2004 71.104 2005 74.461 2006 73.757 2007 76.148 2008 84.714 2009 89.519 2010 93.900 2011 98.000 2012 103.700 2013 106.700 2014 113.800 2015 121.000 2016 129.000 2017 135.063 2018 141.546 2019 145.417 2020 152.893 2021 161.599 2022 167.113 2023 172.879 2024 181.490 2025 190.202 2026 199.331 2027 208.501 2028 217.883 2029 227.688