1997

5.8

1994

8.1

1995

7.9

2014

8.3

2004

8.6

2007

8.0

1985

7.7

1973

0.0

1990

4.4

1984

6.9

1995

5.3

2007

7.5

1995

4.4

1982

5.1

1982

6.7