1978

6.0

2023

6.4

2004

5.6

1995

7.6

1982

7.9

2001

8.4

2002

8.4

2003

8.5

2001

8.5

1987

7.8

1996

7.5

1998

6.8

2001

7.8

2004

7.3

2007

6.3

1992

7.7

1988

7.0

1981

6.5

1988

7.5

2015

4.0