2004

5.9

1998

6.6

1997

6.7

2003

7.6

1973

6.8

1942

5.7

1986

6.9

2000

6.1

1996

6.5

1985

7.0

2009

5.5

2017

6.1

1975

0.0

2004

7.3

1984

6.1

1985

5.4

2017

6.7

1997

5.7

1992

6.9

2003

6.6