1997

7.1

1990

7.5

1964

6.8

1999

6.7

1958

7.5

1972

3.0

1935

5.0

1964

6.1

1972

7.5

1962

6.0

1985

3.1

1989

2.3

1904

7.2

1993

6.6

1986

6.9

1991

4.7

1994

4.7

2008

6.5

1982

7.8

1989

6.1