2015

6.1

1989

7.3

2009

7.4

1989

4.9

2012

5.9

1971

7.1

1965

6.7

2003

5.2

1951

7.6

1987

6.8

1986

6.2

1967

7.3

1950

7.5

2012

6.4

1993

6.6

2001

9.9

1996

5.8

1978

6.7

2006

5.4

1962

7.5