2007

4.7

1969

2.0

1983

3.0

1989

3.2

1985

3.5

2016

5.6

1999

7.4

2003

5.8

1972

3.0

1988

5.6

1995

6.8

1992

0.0

1995

5.8

1970

3.8

2001

3.8

1999

3.2

2000

6.4

2001

5.8

2007

5.7

2017

6.7