1990

6.1

2007

10.0

2007

6.1

2012

6.7

2005

7.5

2001

7.3

1973

7.2

1924

6.9

1993

5.9

2015

7.6

2019

4.5

2017

7.3

1969

6.7

1959

7.7

2011

5.0

2016

4.9

1929

6.3

2017

6.9

1977

4.5

1994

4.6