1989

6.9

1948

5.2

1959

7.8

1985

7.0

2005

7.2

1982

7.9

2016

5.1

1934

6.0

1997

5.1

1997

6.9

1968

6.0

1946

0.0

2001

6.7

1948

5.6

2002

6.3

1974

7.5

1989

6.2

2007

6.5

2008

6.9

2016

3.4