1990

3.0

1997

5.6

1994

2.0

1985

0.0

1996

5.7

1970

0.0

1973

3.5

1974

6.0

2002

8.5

2011

7.0

1987

5.0

1999

8.0

1968

10.0

1986

4.4

2001

7.0

1984

0.0