1978

6.2

1985

5.4

2023

3.6

1973

7.0

1979

6.0

1976

5.2

2018

6.5

1947

6.7

2008

4.0

2000

4.3

1996

5.5

2007

3.9

2004

6.2

1999

5.8

1993

6.6

1986

6.3

1993

0.0

2003

5.7

2004

5.1

2006

6.4