2021

6.8

2002

4.6

1980

6.7

2000

6.4

1990

6.1

1998

6.2

2003

6.0

1983

5.5

1983

7.4

1990

6.4

1999

6.0

1979

5.8

1993

6.5

1991

6.6

2001

7.1

1993

4.5

1985

5.4

2016

6.1

2001

0.0

2007

0.0