1935

7.3

2005

6.7

1990

7.3

1962

7.0

1965

6.7

1971

6.4

1977

6.8

1993

6.5

2003

5.5

2003

6.3

1998

4.4

1964

3.0

1996

6.5

1997

5.2

2002

5.4

2003

5.6

1979

6.0

2003

5.6

1966

6.0

1952

6.1