2003

6.0

2002

7.0

2000

6.3

2005

7.0

1982

8.1

2002

6.3

1988

5.0

2001

6.8

1962

7.7

1995

7.0

1985

7.0

1996

6.9

2006

6.9

2002

5.9

2006

6.4

2017

6.1

2016

4.8

2003

7.2

1997

6.7

2014

5.0