2000

6.7

1983

5.7

2018

6.5

1972

8.1

1998

8.3

2013

8.0

2017

6.2

1959

7.2

1997

6.6

2017

6.0

2008

6.4

2002

7.4

1984

7.2

2008

7.0

1934

7.0

1993

7.9

2007

7.0

1973

6.7

2007

6.2

1998

5.9