1996

6.2

1999

8.5

2002

5.3

2007

4.7

1964

7.3

1982

6.3

2019

5.9

2005

5.0

2007

5.2

1967

8.2

1947

6.5

1959

6.3

2004

5.6

1991

5.0

1983

5.2

1976

5.8

1980

5.4

1978

7.0

2019

7.1

1997

6.6