1994

5.9

1998

6.1

1998

6.8

2017

7.3

1980

4.5

1990

7.4

2010

6.8

2007

6.7

2020

3.8

2000

5.5

1995

7.8

1997

8.3

2006

1.0

1987

6.0

2005

6.7

2001

7.3

1994

7.2