1989

7.2

1989

5.1

1966

8.0

1959

7.3

2009

6.0

2011

6.7

2008

8.0

2003

6.9

2015

6.1

1990

6.4

1969

7.6

1994

6.5

1956

7.1

2002

7.4

1973

8.0

1997

6.8

2003

6.4

1957

7.1

1948

8.0

2000

6.7