1970

6.3

2019

7.2

2022

4.5

1987

7.5

2007

6.7

1989

5.1

1992

7.3

2000

7.2

2007

6.7

2004

5.8

2002

7.5

1989

7.3

2016

6.1

2018

6.5

2019

6.9

2019

5.9

1940

7.6

1991

8.3

2006

7.5

2001

6.4