1987

7.7

2008

8.9

1990

6.9

1989

8.0

1992

7.4

2022

8.5

2018

8.3

2010

8.5

1994

8.4

1983

8.1

1993

7.9

2000

6.8

2008

7.6

2016

7.3

1994

8.0

1989

8.2

1989

8.3

1975

7.2

2009

8.0

1993

8.1