1979

6.0

2004

6.7

1983

3.3

2004

5.3

1972

6.1

2002

6.4

2005

4.9

1999

7.5

1992

7.4

1973

5.0

2006

7.4

1989

6.7

2021

8.5

1972

3.5

1976

5.7

1968

1.0

1930

6.8

2016

5.1

1995

4.7

1997

4.2