1995

7.3

1951

7.6

1950

8.1

2003

7.8

2001

6.2

2001

7.4

1997

6.9

1962

8.0

1998

6.4

2002

7.6

1997

6.6

1998

8.3

1959

7.8

1999

7.0

1989

0.0

1979

7.1

2005

7.7

1961

5.1

1974

7.9

1985

7.7