Line 1, Reduced price.
Point 1, 1969 is No data.
Point 2, 1970 is No data.
Point 3, 1971 is 0.5.
Point 4, 1972 is 0.5.
Point 5, 1973 is 0.5.
Point 6, 1974 is 0.5.
Point 7, 1975 is 0.6.
Point 8, 1976 is 0.8.
Point 9, 1977 is 1.3.
Point 10, 1978 is 1.5.
Point 11, 1979 is 1.7.
Point 12, 1980 is 1.9.
Point 13, 1981 is 1.9.
Point 14, 1982 is 1.6.
Point 15, 1983 is 1.5.
Point 16, 1984 is 1.5.
Point 17, 1985 is 1.6.
Point 18, 1986 is 1.6.
Point 19, 1987 is 1.6.
Point 20, 1988 is 1.6.
Point 21, 1989 is 1.6.
Point 22, 1990 is 1.7.
Point 23, 1991 is 1.8.
Point 24, 1992 is 1.7.
Point 25, 1993 is 1.7.
Point 26, 1994 is 1.8.
Point 27, 1995 is 1.9.
Point 28, 1996 is 2.
Point 29, 1997 is 2.1.
Point 30, 1998 is 2.2.
Point 31, 1999 is 2.4.
Point 32, 2000 is 2.5.
Point 33, 2001 is 2.6.
Point 34, 2002 is 2.6.
Point 35, 2003 is 2.7.
Point 36, 2004 is 2.8.
Point 37, 2005 is 2.9.
Point 38, 2006 is 2.9.
Line 2, Full price.
Point 1, 1969 is 16.5.
Point 2, 1970 is 17.8.
Point 3, 1971 is 17.8.
Point 4, 1972 is 16.6.
Point 5, 1973 is 16.1.
Point 6, 1974 is 15.5.
Point 7, 1975 is 14.9.
Point 8, 1976 is 14.6.
Point 9, 1977 is 14.5.
Point 10, 1978 is 14.9.
Point 11, 1979 is 15.3.
Point 12, 1980 is 14.7.
Point 13, 1981 is 13.3.
Point 14, 1982 is 11.5.
Point 15, 1983 is 11.2.
Point 16, 1984 is 11.5.
Point 17, 1985 is 12.1.
Point 18, 1986 is 12.2.
Point 19, 1987 is 12.4.
Point 20, 1988 is 12.8.
Point 21, 1989 is 12.9.
Point 22, 1990 is 12.6.
Point 23, 1991 is 12.2.
Point 24, 1992 is 11.7.
Point 25, 1993 is 11.4.
Point 26, 1994 is 11.3.
Point 27, 1995 is 11.4.
Point 28, 1996 is 11.3.
Point 29, 1997 is 11.3.
Point 30, 1998 is 11.4.
Point 31, 1999 is 11.6.
Point 32, 2000 is 11.9.
Point 33, 2001 is 12.
Point 34, 2002 is 12.
Point 35, 2003 is 11.9.
Point 36, 2004 is 12.
Point 37, 2005 is 12.2.
Point 38, 2006 is 12.4.
Line 3, Free.
Point 1, 1969 is 2.9.
Point 2, 1970 is 4.6.
Point 3, 1971 is 5.8.
Point 4, 1972 is 7.3.
Point 5, 1973 is 8.1.
Point 6, 1974 is 8.6.
Point 7, 1975 is 9.4.
Point 8, 1976 is 10.2.
Point 9, 1977 is 10.5.
Point 10, 1978 is 10.3.
Point 11, 1979 is 10.
Point 12, 1980 is 10.
Point 13, 1981 is 10.6.
Point 14, 1982 is 9.8.
Point 15, 1983 is 10.3.
Point 16, 1984 is 10.3.
Point 17, 1985 is 9.9.
Point 18, 1986 is 10.
Point 19, 1987 is 10.
Point 20, 1988 is 9.8.
Point 21, 1989 is 9.7.
Point 22, 1990 is 9.8.
Point 23, 1991 is 10.3.
Point 24, 1992 is 11.2.
Point 25, 1993 is 11.7.
Point 26, 1994 is 12.2.
Point 27, 1995 is 12.4.
Point 28, 1996 is 12.6.
Point 29, 1997 is 12.9.
Point 30, 1998 is 13.
Point 31, 1999 is 13.
Point 32, 2000 is 13.
Point 33, 2001 is 12.9.
Point 34, 2002 is 13.3.
Point 35, 2003 is 13.7.
Point 36, 2004 is 14.1.
Point 37, 2005 is 14.6.
Point 38, 2006 is 14.8.