2017

7.3

2018

6.4

1982

7.6

2000

7.5

2001

7.4

2001

7.4

1998

8.2

1999

7.7

1993

8.6

2001

7.9

2000

7.4

2003

7.2

1994

7.0

1993

6.3

2006

6.9

2006

7.9

1999

6.8

1998

6.8

2019

7.7

2019

5.8