2012

5.3

1985

5.1

1988

5.2

1987

4.6

1990

4.1

1982

5.5

1982

7.5

1986

7.1

2003

7.6

1994

7.4

1989

6.5

1983

5.0

2005

5.2

1987

5.8

2016

5.8

1982

4.0