1986

0.0

2019

6.9

2005

6.4

2006

6.3

1990

6.6

1980

2.0

1999

6.4

2015

5.9

1975

5.5

1976

1.5

2020

1.0

2020

7.0

2017

6.3

1969

3.0

2005

6.0

2009

6.6

1996

7.2

2006

6.6

2018

6.5

1997

6.1