1986

6.7

1999

6.5

2000

6.9

1988

6.3

2000

6.3

1983

5.2

1986

6.1

2002

6.8

2013

0.0

1974

7.1

1975

5.5

1976

6.6

2007

6.5

2008

8.5

1980

6.3

2000

5.2

2016

7.2

2001

7.3

1983

4.4

1982

5.7