1962

7.3

1968

5.8

2003

5.5

1993

6.3

2017

5.8

1997

4.8

2021

7.2

1994

5.9

2007

4.8

1995

6.2

2007

6.4

1979

5.8

2013

7.4

1993

6.9

2016

6.5

2006

7.0

2016

1.8

1983

5.1

1980

6.4

2001

6.3