1973

7.4

2008

5.6

1980

7.0

2006

5.4

2009

5.9

2009

5.0

2006

8.0

2007

5.6

2023

6.4

1969

6.5

1964

6.9

1997

7.5

2009

6.7

1974

6.1

1973

6.8

2015

7.4

1980

6.6

1968

6.8

1999

5.6

2018

5.6