1998

8.1

2008

6.6

2006

8.2

2014

5.9

1977

5.6

1973

6.5

2022

6.5

1981

7.5

1993

7.0

2016

4.3

1985

2.0

1973

4.0

2001

3.0

2004

5.6

1966

6.3

1980

6.6

1986

6.9

2004

6.8

1993

6.2

2002

4.3