2006

4.3

1993

4.0

2013

5.2

1983

6.2

1986

6.0

1995

5.7

1975

5.9

2007

4.7

1974

5.4

1988

7.6

1975

7.7

2003

5.6

2021

6.0

1995

4.0

2014

3.7

1980

6.8

2009

5.8

1952

6.6

1992

5.3

1959

6.9