1998

6.9

2006

6.8

1982

6.2

2000

5.8

2000

6.0

1996

7.3

1966

6.5

1956

5.3

1959

6.7

1934

5.0

1963

4.0

2002

5.5

1996

5.8

2016

5.3

2004

7.0

1984

5.4

1973

7.9

1996

7.0

1939

6.3

1992

5.6