1976

5.3

2009

5.8

2016

5.1

2004

6.7

1995

4.2

2005

4.9

2002

6.3

2016

6.7

1972

6.2

2006

6.5

2016

6.0

1997

3.7

1989

6.7

2004

5.3

2002

6.4

1930

6.8

2006

7.4

1973

5.2

1992

7.4

2023

6.1