1989

5.2

1993

5.4

2000

5.2

1967

6.6

2019

8.4

2018

7.3

1992

7.0

2021

5.7

2013

5.7

2010

5.3

2020

7.5

1981

7.1

2011

5.9

1979

6.7

1978

7.4

1960

7.5

1997

6.3

2018

6.1

1972

6.4