1987

0.0

1989

4.5

1993

8.0

2001

8.2

2011

7.6

2012

6.8

1967

7.4

1989

7.9

2004

8.0

1996

5.2

1999

7.1

2003

7.2

2004

8.3

2023

7.0

2015

0.0

1969

5.4

2007

6.2

2020

8.4

1999

5.4

2001

6.6