1999

6.5

1951

7.7

1998

6.9

2014

5.9

0.0

1996

5.6

2015

0.0

2000

5.7

2008

4.8

1988

7.1

1990

6.4

1981

7.4

1997

6.6

2018

6.7

2017

4.7

1994

3.8

2005

5.6

2014

4.6

2017

4.7

1987

6.8