1990

6.1

1952

6.7

1990

6.1

2001

6.0

1972

7.9

1988

6.7

1958

7.0

2004

6.8

1958

7.5

1992

6.7

2000

6.9

1965

6.8

1989

7.8

1986

6.3

1961

7.9

1969

7.1

1953

7.3

1996

5.8

1977

6.5

1999

6.2