1990

6.1

2003

7.1

1994

6.6

2002

7.4

2019

7.3

1966

6.3

2016

7.4

1993

7.3

1951

5.8

1973

6.3

2006

6.8

2009

6.9

2009

7.2

2011

6.4

1997

6.3

2000

6.7

1920

7.9

1965

6.0

1987

5.7

1932

7.8