Year 2010 = 100 1978 0.096557049203702 1979 0.11421894278673 1980 0.142172208531121 1981 0.176989071189742 1982 0.276201439246546 1983 0.572784462296886 1984 0.975644610835342 1985 1.49818722186428 1986 2.82232231611973 1987 6.65041504242958 1988 13.8213369514333 1989 16.0419076904954 1990 19.787355629107 1991 23.8499130101451 1992 27.0417671999888 1993 29.4458928895872 1994 31.4438457192156 1995 43.7438137105538 1996 59.6436972466596 1997 70.6809492780993 1998 80.5058599668519 1999 92.302035036369 2000 100