1980

7.9

2006

5.4

2007

6.9

1991

6.5

1995

6.0

2020

0.0

1997

6.1

1995

6.3

2021

7.3

1997

7.8

2002

6.7

1993

6.9

2002

4.7

2015

8.2

2003

7.2

1945

0.0

1994

7.4

1995

7.0

2000

6.9

2015

0.0