1930

7.3

1994

7.1

2010

7.0

1980

7.1

2001

7.3

2006

6.6

1973

7.4

2005

6.8

2002

6.7

1962

6.0

1960

10.0

1943

8.2

2021

6.0

1991

1.0

2002

7.2

2019

6.4

2016

4.9

1998

5.5

2015

0.0

2016

6.0