2015

6.3

1990

7.7

2006

5.8

2002

6.2

1960

7.2

1998

7.2

2000

7.1

2000

6.5

1965

7.2

2007

7.5

2003

5.8

1950

6.8

1991

3.3

2001

6.3

1969

6.0

1978

6.5

2021

6.4

1942

7.5

2014

6.1

1999

6.7