2001

6.6

2003

6.5

1975

6.8

2004

5.1

2002

6.5

2010

6.3

2009

4.2

1964

4.0

2001

6.9

1996

6.9

2017

6.0

2018

2.0

2003

6.5

1976

5.7

2000

6.7

1993

7.0

1983

4.8

1983

7.0

1994

3.9

1997

6.0