2006

7.7

2004

8.1

1990

7.7

2004

7.1

1975

8.4

2002

6.8

1991

7.4

2007

6.9

2007

7.2

2003

7.5

1989

5.0

1994

8.5

1997

8.4

1991

8.0

2017

6.0

2017

10.0

1997

6.5

2018

8.2

1991

4.2

1977

8.0