1984

7.1

2006

6.2

1970

6.3

2021

6.2

2012

7.3

2022

4.5

1980

6.7

2002

6.4

1991

7.1

1989

6.5

2019

7.7

2008

7.1

1988

7.6

2007

6.5

1994

7.4

1980

6.6

1989

5.1

2011

6.1

1999

5.8

2015

5.9