1976

6.5

1989

7.2

2003

6.8

2004

4.6

1992

6.9

2001

6.2

1999

8.5

1988

2.5

2016

2.3

1995

5.9

2002

5.6

2001

6.3

1996

5.9

2000

5.5

2003

5.3

1994

7.5

1995

6.9

1995

5.4

2020

6.0

2020

7.2