1994

5.3

1972

6.2

1997

6.1

1976

3.3

1993

7.0

2001

6.2

1990

7.4

1975

4.3

2003

6.4

1990

6.7

2006

6.3

2000

3.0

1948

6.5

1997

6.8

2005

6.7

2017

4.9

1982

1.7

2004

6.3

1989

6.9

1995

4.9