1999

4.2

1977

7.3

2021

1.0

2019

6.3

1994

5.7

2007

4.2

1974

5.0

2018

7.0

2005

4.0

1981

5.8

2016

8.0

2001

5.0

2012

4.4

1968

7.0

1988

7.1

1970

7.7

8.0