1988

5.1

2004

7.2

2006

7.0

2017

6.0

2003

6.0

2007

4.2

2019

8.2

2019

5.8

2004

5.6

1987

7.3

1999

7.4

2003

5.9

2001

2.0

1969

2.0

1986

5.0

2001

7.4

1991

5.9

1989

6.9

1995

6.4

2003

6.5