1986

7.4

1981

6.8

1999

6.9

1985

6.6

1909

5.0

1982

7.6

2003

6.3

2003

6.3

1992

6.8

2005

7.0

1996

4.8

1999

6.8

2001

7.0

2002

6.4

2016

4.5

2008

4.0

2015

0.0

2006

6.4

1998

5.4

1998

7.3