2001

8.0

1997

7.5

1999

7.6

1991

6.8

2000

8.0

2025

7.8

1985

6.3

2017

0.0

1978

7.3

2009

7.8

2021

7.1

2016

6.0

1983

6.1

1968

7.0

2015

7.5

2018

0.0

0.0

1969

7.4

2006

8.1

2006

5.0