1961

7.8

2013

7.5

2010

6.8

1966

6.1

1972

7.9

1954

8.4

2011

7.0

1999

5.1

2008

7.5

1963

7.2

2019

7.7

2015

6.7

1986

6.6

1974

6.5

2017

7.0

2018

6.5

1959

7.7

1977

8.2

1960

8.0

2024

6.3