1939

5.3

2006

5.4

1950

6.8

1956

6.5

2007

7.6

2007

7.2

2001

6.3

2004

7.0

2002

5.9

1999

6.8

1997

7.8

2000

6.5

1960

7.3

2002

6.3

2021

7.1

1954

7.3

2002

7.0

2002

7.4

1937

6.6

1956

6.7