1982

7.9

2009

6.1

2003

6.2

1979

8.2

1985

6.5

2017

5.7

2021

5.6

1989

3.0

1991

6.1

2001

7.0

1986

7.9

1997

6.6

1999

6.3

2002

6.0

2004

7.2

1983

6.0

1975

7.3

1986

6.4

2000

6.1

2006

5.3