1966

6.3

1980

5.7

2018

7.1

2011

7.2

2008

5.1

1968

6.9

1973

7.0

2014

6.8

1968

6.1

2020

7.4

2010

5.9

1997

6.3

1984

6.4

1923

8.5

1975

5.9

2002

7.8

2023

0.0

1987

5.7

2014

6.1