1997

6.1

2020

7.4

2021

7.2

2004

10.0

2010

6.6

2006

9.8

1961

6.9

2006

5.1

1972

7.1

1949

7.5

1965

6.8

1990

6.0

1964

7.0

1941

7.3

1962

6.9

1967

6.8

1962

7.9

1974

6.4

1952

7.0

1971

6.8