1992

7.2

1973

7.0

1986

5.8

1971

7.9

1994

5.8

2002

5.2

1991

7.5

1958

6.4

1991

10.0

1982

8.1

2005

8.2

1981

7.6

2003

7.2

1991

4.0

1998

7.0

1964

0.0

1977

7.3

2005

7.5

1969

6.1

1964

5.0

1999

6.5

2007

7.2

1982

7.1

1983

6.3

1989

8.3

1990

6.0

1994

7.0

1997

0.0

1971

6.9

2002

3.6

2000

4.0

1981

7.2

2006

5.3

1920

0.0

1963

5.8

1999

8.7

1967

4.6

1956

5.1

1970

6.1