1999

7.6

2020

8.1

1986

6.0

1963

7.9

1987

7.4

1978

6.5

2011

7.6

2013

7.2

2016

7.0

2007

6.0

1991

9.0

1991

10.0

2007

6.9

1995

5.4

1996

7.8

1983

4.6

1994

6.0