1999

7.4

2002

7.5

2011

7.6

2012

8.2

1999

8.4

2010

8.5

2005

7.0

2000

6.4

1993

6.7

2010

8.0

2000

8.2

1997

7.3

2009

5.8

2006

6.9

2024

8.4

1997

8.4

1993

8.4

2015

6.5

1960

7.4

2023

8.6