1985

6.4

2000

6.5

1990

6.7

2005

4.5

2001

6.1

1968

3.0

2008

5.2

1948

7.2

2023

0.0

1968

3.7

1985

7.6

1991

5.7

2004

7.1

2005

5.9

2002

5.8

2006

6.6

2003

5.2

1977

7.0

1975

6.1

1989

5.2