2004

5.6

2015

3.0

2002

6.3

2003

6.2

1992

7.5

2007

6.9

2016

4.2

2000

5.8

1976

5.6

2017

6.7

1994

6.6

1970

1.0

1996

7.0

2009

5.4

2004

3.1

1992

4.9

2024

5.5

1997

2.7

2004

3.8

1989

6.0