2013

6.2

2014

6.0

1991

7.4

2003

6.0

2006

4.5

2015

6.5

2024

5.9

2024

6.0

2002

4.8

2005

5.0

2009

5.9

2024

4.9

1987

5.1

2000

4.4

1969

4.6

1970

3.8

1964

5.5

1967

6.9

2004

5.2

1978

6.1