2014

4.6

1991

7.2

2011

7.3

2012

7.6

1968

7.1

1949

6.9

1964

7.4

2011

9.8

2019

8.7

1931

5.0

2000

7.8

1995

6.7

2004

5.8

1986

6.4

1985

3.5

1960

8.3

2016

7.9

1984

9.7

2010

8.2

2009

7.0