1970

2.8

1973

3.0

2004

7.4

1990

6.4

2017

6.3

2022

6.0

1947

6.1

2007

6.3

1971

7.2

2009

5.8

1975

5.7

1979

6.7

1988

6.3

2015

6.5

1976

5.6

1949

6.1

2000

6.8

1942

6.4

2001

0.0

2002

6.9