1990

0.0

2007

5.3

2009

5.7

2019

6.1

1988

7.0

2002

6.8

1987

0.0

1998

9.0

1999

7.8

2017

6.9

1994

7.2

0.0

1971

6.4

1996

1.0

2001

5.0

1981

6.7

1995

4.3

2015

8.5