1946

338.5

1966

740.3

1986

742.5

1947

340.0

1967

727.1

1987

786.2

1948

480.0

1968

759.7

1988

749.9

1949

590.0

1969

806.9

1989

691.6

1950

540.0

1970

740.4

1990

575.9

1946-1950

2288.5

1966-1970

3774.4

1986-1990

3546.1

1951

461.0

1971

691.3

1991

580.0

1952

421.1

1972

745.1

1992

505.7

1953

469.2

1973

798.2

1993

363.2

1954

577.0

1974

736.4

1994

303.5

1955

530.7

1975

777.8

1995

259.2

1951-1955

2459.0

1971-1975

3748.8

1991-1995

2011.6

1956

542.1

1976

736.6

1996

282.0

1957

905.2

1977

627.3

1997

270.7

1958

1035.6

1978

607.8

1998

220.3

1959

1088.4

1979

720.9

1999

242.1

1960

936.9

1980

658.0

2000

251.1

1956-1960

4508.2

1976-1980

3350.6

1996-2000

1266.2

1961

851.6

1981

653.4

2001

128.0

1962

926.2

1982

659.0

2002

192.3

1963

892.8

1983

772.5

2003

223.2

1964

720.5

1984

696.0

2004

215.9

1965

785.9

1985

725.2

2005

198.7

1961-1965

4177.0

1981-1985

3506.1

2006

250.8

2001-2006

1208.9

2007

325.2