Year Index 2010=1, Trend 1978-01-01 0.198263833570387 1979-01-01 0.234302536869987 1980-01-01 0.271180612307526 1981-01-01 0.302480913852869 1982-01-01 0.337273948613115 1983-01-01 0.333479832404368 1984-01-01 0.338290998693977 1985-01-01 0.378387790007164 1986-01-01 0.425215485750057 1987-01-01 0.449446199093524 1988-01-01 0.473566688372626 1989-01-01 0.470168046505602 1990-01-01 0.509780984026946 1991-01-01 0.594032508642794 1992-01-01 0.594537420237886 1993-01-01 0.569632089818958 1994-01-01 0.591809412036349 1995-01-01 0.578780482007400 1996-01-01 0.573302460181441 1997-01-01 0.599957543251477 1998-01-01 0.636960296202971 1999-01-01 0.633092801340040 2000-01-01 0.651160915064844 2001-01-01 0.650561616868362 2002-01-01 0.653870726298151 2003-01-01 0.660455319397730 2004-01-01 0.730706443310555 2005-01-01 0.809283562940404 2006-01-01 0.864373984445010 2007-01-01 0.932797800629446 2008-01-01 1.049948573222130 2009-01-01 1.077693335369310 2010-01-01 1.000000000000000