1996

10.0

2021

9.2

1981

7.8

2016

6.8

2012

7.0

1993

5.8

1989

7.9

2000

6.2

1970

7.7

1957

5.2

2012

7.9

1980

5.2

1988

6.1

2005

6.0

2000

4.0

1992

7.4

2003

4.0

2011

4.0

2005

7.0