1968

6.9

2014

6.3

2010

7.7

1988

6.4

2020

6.9

1982

5.8

2007

6.9

2001

6.9

2015

5.1

2017

6.9

1923

8.5

1973

7.4

2017

6.0

2013

8.2

1935

6.6

1943

6.4

1948

7.3

1938

7.0

2018

6.1

2024

5.0