2010

6.6

2015

6.0

1989

6.3

1967

6.8

2000

7.7

1941

7.4

1942

5.8

1988

7.6

1962

6.9

1974

7.0

2014

6.0

1968

6.9

2004

6.8

1966

6.3

1999

7.0

1978

7.4

2009

6.9

1980

5.8

1994

7.9

1996

7.4