1991

7.3

1998

7.0

2008

5.8

2003

5.5

1991

6.4

2004

5.6

1986

5.9

1916

0.0

1992

7.5

1984

6.5

1994

6.7

1941

7.4

2014

7.3

1970

7.0

2002

6.4

2008

6.6

2009

6.3

1951

7.3

1947

7.0

1962

7.6