1993

7.4

2000

8.1

1974

7.3

1994

6.5

1989

6.6

1934

7.8

1944

6.7

2008

6.4

1960

8.1

2006

6.6

1994

5.5

2005

6.2

1966

6.7

1999

6.2

2014

6.5

2003

6.4

1936

7.5

1949

6.9

1964

6.8

1951

4.6