Line 1, Public.
Point 1, 1970 is 2.5.
Point 2, 1971 is 2.5.
Point 3, 1972 is 2.8.
Point 4, 1973 is 2.8.
Point 5, 1974 is 2.8.
Point 6, 1975 is 2.9.
Point 7, 1976 is 3.
Point 8, 1977 is 3.3.
Point 9, 1978 is 3.5.
Point 10, 1979 is 3.5.
Point 11, 1980 is 3.5.
Point 12, 1981 is 3.6.
Point 13, 1982 is 3.6.
Point 14, 1983 is 3.6.
Point 15, 1984 is 3.5.
Point 16, 1985 is 3.6.
Point 17, 1986 is 3.6.
Point 18, 1987 is 3.6.
Point 19, 1988 is 3.6.
Point 20, 1989 is 3.7.
Point 21, 1990 is 3.8.
Point 22, 1991 is 3.8.
Point 23, 1992 is 3.9.
Point 24, 1993 is 3.8.
Point 25, 1994 is 3.9.
Point 26, 1995 is 3.8.
Point 27, 1996 is 3.7.
Point 28, 1997 is 3.7.
Point 29, 1998 is 3.8.
Point 30, 1999 is 4.
Point 31, 2000 is 4.
Point 32, 2001 is 4.1.
Point 33, 2002 is 4.3.
Line 2, Private.
Point 1, 1970 is 2.2.
Point 2, 1971 is 2.2.
Point 3, 1972 is 2.2.
Point 4, 1973 is 2.4.
Point 5, 1974 is 2.5.
Point 6, 1975 is 2.5.
Point 7, 1976 is 2.7.
Point 8, 1977 is 3.1.
Point 9, 1978 is 3.3.
Point 10, 1979 is 3.4.
Point 11, 1980 is 3.8.
Point 12, 1981 is 3.5.
Point 13, 1982 is 3.6.
Point 14, 1983 is 3.7.
Point 15, 1984 is 4.
Point 16, 1985 is 4.
Point 17, 1986 is 4.1.
Point 18, 1987 is 3.8.
Point 19, 1988 is 4.1.
Point 20, 1989 is 4.2.
Point 21, 1990 is 4.3.
Point 22, 1991 is 4.4.
Point 23, 1992 is 4.3.
Point 24, 1993 is 4.5.
Point 25, 1994 is 4.4.
Point 26, 1995 is 4.7.
Point 27, 1996 is 4.7.
Point 28, 1997 is 5.
Point 29, 1998 is 5.1.
Point 30, 1999 is No data.
Point 31, 2000 is No data.
Point 32, 2001 is No data.
Point 33, 2002 is No data.