1953

6.6

2005

5.9

2007

8.3

1976

8.1

1997

7.4

1988

5.8

2003

6.2

1988

7.6

1997

6.5

1996

7.0

2023

8.0

2011

6.9

1985

7.0

1976

6.9

1989

7.8

2008

6.0

1986

7.2

2016

6.6

1962

7.7