1988

6.5

1979

4.7

1993

6.1

1988

6.1

1989

6.2

2004

4.9

1987

5.7

1943

7.6

1928

7.3

1996

6.5

2013

4.7

1941

7.4

1975

6.8

2016

6.7

1982

5.8

2008

5.4

2011

6.9

1971

7.4

2010

5.9