1953

6.8

1984

6.8

1995

7.9

1985

6.2

2008

5.7

2006

6.5

1995

5.8

1984

5.5

1992

5.4

1981

7.4

1995

5.4

2015

7.6

1998

6.4

0.0

1971

8.2

1998

6.4

1984

7.7

1997

7.1

1999

8.2

2003

7.1