1980

6.7

2020

6.5

1962

7.2

2013

6.0

1990

7.5

1993

7.8

1996

7.6

2019

0.0

2016

6.5

1934

6.3

2014

7.0

2015

7.0

2014

6.1

2012

6.8

1915

0.0

1927

0.0

1924

0.0

1926

0.0

1999

5.6

1961

8.0