1989

5.3

1981

6.6

2021

7.2

1980

8.4

1977

7.0

2010

5.5

2005

7.5

2000

5.5

1982

6.7

2010

6.8

2020

6.5

2020

6.8

2004

5.9

2012

5.5

2015

6.1

1953

7.2

1985

5.8

1993

4.9

1968

6.9

1965

7.9