2001

4.0

1975

3.1

2015

4.6

2003

6.0

1998

4.1

1972

5.1

1995

6.5

2013

4.4

2004

5.2

2018

4.3

2018

1.0

2017

6.8

1992

4.2

2002

3.6

1970

3.0

2005

4.9

1983

5.1

1999

6.0

2019

8.1

2003

2.8