1954

5.2

1999

7.2

1999

6.8

2003

6.3

1978

7.2

1997

6.9

1968

7.1

1975

7.8

1947

7.6

1961

7.3

2007

6.7

2002

5.3

2001

5.9

2005

6.8

2020

6.3

1968

4.9

1965

6.8

1967

6.7

1998

6.7

1995

5.4