1971

4.5

1959

5.4

1955

2.4

2003

5.2

1992

4.7

1991

10.0

1981

6.4

1896

7.1

2011

5.0

2012

6.0

1933

6.6

1980

4.8

1964

5.6

1948

5.0

1916

6.6

1916

6.2

1969

6.4

2014

6.0

1970

7.0

2004

5.8