Year Index 2010=1, Trend 1970-01-01 0.172908776212090 1971-01-01 0.183147083227069 1972-01-01 0.192138533287423 1973-01-01 0.207971544835234 1974-01-01 0.237143141316793 1975-01-01 0.278325310279265 1976-01-01 0.306900784531462 1977-01-01 0.334283846488682 1978-01-01 0.366114162052516 1979-01-01 0.404087906783616 1980-01-01 0.451989238045816 1981-01-01 0.505126641625015 1982-01-01 0.566752608175580 1983-01-01 0.614818979819784 1984-01-01 0.650979488881232 1985-01-01 0.687255552093318 1986-01-01 0.702688464021950 1987-01-01 0.724987235070814 1988-01-01 0.734871373518242 1989-01-01 0.745830014477800 1990-01-01 0.778211972387944 1991-01-01 0.797837044283621 1992-01-01 0.818494693320850 1993-01-01 0.833915454573437 1994-01-01 0.826475733303829 1995-01-01 0.824982428122258 1996-01-01 0.831521098003238 1997-01-01 0.822444733825340 1998-01-01 0.816310980938479 1999-01-01 0.818720517537251 2000-01-01 0.829182763946501 2001-01-01 0.848394736853151 2002-01-01 0.869990949631870 2003-01-01 0.879802863550126 2004-01-01 0.892957706173386 2005-01-01 0.906073792705997 2006-01-01 0.925610583643702 2007-01-01 0.937802801823452 2008-01-01 0.968219228572724 2009-01-01 0.997696923177768 2010-01-01 1.000000000000000