2002

4.7

2015

8.3

2009

4.6

1964

7.4

6.6

2000

4.8

1981

5.1

1999

7.4

2019

5.7

1997

6.7

1993

5.3

2021

6.0

2000

5.7

1971

6.0

1912

6.0

2012

10.0

2011

6.9

2013

4.0