2001

6.6

1990

6.1

1947

6.9

1991

5.3

1989

6.3

2004

5.8

1966

7.6

1984

6.2

2007

7.1

1999

4.7

2008

4.0

2020

6.9

2021

6.7

1991

6.5

1987

6.4

1986

6.9

1967

4.4

2016

4.8

1982

6.3

1984

0.0