Year Index (Units) 1980 0.930 1981 1.142 1982 1.425 1983 1.716 1984 2.096 1985 2.618 1986 3.382 1987 4.172 1988 5.330 1989 6.646 1990 8.522 1991 10.744 1992 13.217 1993 16.377 1994 20.572 1995 24.451 1996 28.575 1997 33.387 1998 38.320 1999 43.156 2000 47.970 2001 51.097 2002 54.146 2003 57.844 2004 62.056 2005 65.642 2006 69.454 2007 73.067 2008 78.677 2009 81.874 2010 84.989 2011 90.417 2012 93.687 2013 95.475 2014 97.609 2015 100.000 2016 105.148 2017 110.546 2018 115.665 2019 120.295 2020 122.078 2021 131.602 2022 151.167 2023 160.762 2024 169.742 2025 174.896 2026 180.142 2027 185.547 2028 191.113 2029 196.846