1991

5.9

1987

7.0

1992

6.2

1977

7.3

2016

0.0

1971

8.1

2011

5.0

2020

4.7

1972

4.5

2011

0.0

1977

7.0

1988

0.0

2018

0.0

1972

6.9

2016

7.4

2002

6.8

2010

5.2

2002

7.1

2011

2.0

2019

8.2