1990

6.9

1998

9.0

2003

8.2

2022

7.7

1975

7.7

2005

8.3

1995

6.4

1989

5.9

1990

8.0

2009

8.3

2020

6.9

2020

7.6

1980

7.3

2015

7.4

2009

7.3

2007

8.1

2017

8.2

2007

8.5

1993

8.4

1999

8.4