1986

7.0

1987

3.7

2016

5.1

1987

8.0

2006

6.5

1970

6.8

2018

7.1

2017

4.8

2007

6.6

1965

6.8

1973

5.7

2005

7.3

1931

6.0

1931

8.2

2000

6.2

2006

3.0

1976

6.4

2015

0.0

1927

0.0

1994

6.9