1984

5.0

1985

7.7

1996

6.8

1998

6.9

2015

6.2

1999

7.1

1998

6.6

2005

7.4

2007

6.7

1992

7.1

2007

7.6

2016

6.5

2018

7.1

2018

6.6

1997

7.6

2003

6.1

1995

8.0

2000

7.4

2019

7.9

1987

7.1