2013

9.2

2015

7.4

1990

6.1

2014

5.6

1968

6.9

2020

7.4

2023

6.5

2023

8.4

1985

7.0

1972

6.5

1922

6.7

2012

6.4

1922

6.2

1939

5.0

2003

7.2

1935

7.5

1918

5.7

1948

7.2