1939

7.5

1937

7.9

1928

8.0

1997

7.0

1982

7.6

1996

7.3

1932

6.9

2000

7.5

2005

6.7

1993

7.2

1966

7.2

1986

7.7

1986

7.6

1998

6.8

1999

6.8

1966

8.1

1953

7.3

1999

7.1