1992

7.5

2008

5.9

2000

6.0

1993

5.7

1981

6.7

1991

0.0

2006

5.6

1984

8.0

2011

8.5

2007

6.8

1992

7.1

2015

5.6

2018

4.3

1990

8.1

1993

5.5

2001

8.4

2000

5.5

2014

7.1

2018

6.8

1988

8.0

2012

6.3

2006

6.4

1979

6.7

1999

0.0

2004

6.6

1997

2.5

1997

0.0

1989

5.8

1977

7.5

1999

6.6

1991

5.9