1970

7.1

2002

6.6

1991

7.7

2001

6.4

2006

5.7

1967

5.8

2014

4.2

1993

4.1

2021

7.1

2017

4.6

1996

4.3

2001

5.7

2004

5.6

2002

7.3

1999

6.9

2022

4.5

2004

6.1

2000

7.1

2005

6.7

2007

6.5