1959

7.9

1985

7.5

2003

7.2

2003

7.2

1997

5.7

2003

6.3

1952

7.0

1986

6.3

2006

7.5

2020

7.1

1995

5.8

2003

7.8

1925

7.3

1976

6.8

1942

6.4

2014

5.2

1964

5.6

1934

6.5

1962

6.6

1951

6.9