1992

7.4

2005

4.9

1979

6.0

2004

6.7

2016

5.1

1978

4.0

1972

6.2

2002

6.4

1968

1.0

2004

5.3

1930

6.8

2006

7.4

1973

5.0

1972

3.5

1989

6.7

1976

5.7

1997

4.2

1995

4.7

1999

7.5

1977

5.1