1992

7.5

2013

6.2

1990

6.4

2009

4.6

2017

6.9

1964

8.1

1971

7.7

1953

5.4

1985

7.4

2014

6.8

1998

7.7

1980

7.9

2013

7.1

1989

7.2

1949

7.7

1973

7.2

2006

6.8

1993

6.6

2023

8.6

1924

8.1