1992

6.8

1972

7.1

1998

1.0

2016

5.6

2005

6.2

2018

6.6

2015

5.1

1999

5.6

1988

5.4

1977

6.2

2016

4.5

2007

6.6

1972

6.0

1998

0.0

2007

4.5

2007

4.7

2002

5.3

2019

3.8

1974

5.8

2009

4.3