1992

6.7

1987

5.6

2016

4.4

1958

2.0

1983

0.0

2008

6.6

1999

6.9

1999

6.9

2003

4.9

2000

6.8

2004

3.9

1999

6.8

2004

5.6

1968

7.3

2002

6.3

1997

5.1

2003

5.9

1997

6.2

1985

5.8

2006

5.0