1991

0.0

2005

6.4

2019

6.4

1999

6.4

1990

6.7

2006

6.3

1980

5.1

1976

2.0

2002

6.8

1983

5.2

2001

5.1

1999

6.5

1987

6.9

1989

4.5

1985

5.8

2023

7.2

1975

5.5

2007

5.6

1996

3.5

2009

4.2