1989

0.0

1982

6.1

2006

6.6

2005

5.1

1994

8.0

1990

5.8

1978

7.5

2015

8.0

1999

5.5

2001

7.4

2008

6.4

2017

5.6

2005

6.1

2019

0.0

2006

4.6

2008

6.2

2002

6.8

2005

5.7

1971

6.2

2004

6.9