1939

7.5

1953

6.9

1997

7.6

1996

7.3

2005

6.7

1993

7.2

1966

7.2

1998

6.8

1999

6.8

1953

7.3

1999

7.1

1987

7.3

1962

7.3

1953

7.9

2001

7.8

2004

7.3