Table 2.

Percentage data coverage (received files)

Date	% Y1C1	% Y2C1	% Y1C2	%Y2C2	% Y1C3
Start Y1C1
November 2005	47
Start Y2C1 & YY1C2
December 2005	55
January 2006	73.5
18-05-06	85 baseline 82.5 follow-up	55 baseline	69.5 baseline
06-06-06		59 baseline	73 baseline
13-09-06		77.5 baseline	93 baseline
22-09-06		85 baseline	93 baseline
		36.5 follow-up	47 follow-up
Start Y2C2 & YY1C3
24-11-06		88 baseline	94 baseline
		50 follow-up	63 follow-up
08-12-06		87 baseline	97 baseline
		53 follow-up	70 follow-up
29-01-07		90 baseline	98 baseline
		56 follow-up	81 follow-up
15-04-07		90 baseline	98 baseline	71 baseline	51 baseline
		58 follow-up	82 follow-up
25-05-07		90.7 baseline	99.1 baseline
		57.1 follow-up	81.7 follow-up
11-06-07				78 baseline	61.9 baseline
05-07-07				83.2 baseline 62.3 follow-up	85.6 baseline 37.7 follow-up
				83.2 baseline	87.5 baseline
31-08-07				72.9 follow-up	45.7 follow-up
03-09-07				83.2 baseline	88.4 baseline
18-09-07				76.8 follow-up	60.6 follow-up
04-10-07
09-10-07				83.2 baseline 76.8 follow-up	91.2 baseline 68.3 follow-up
13-11-07				83.2 baseline 76.8 follow-up	91.2 baseline 69.2 follow-up
02-01-08				83.2 baseline 78.8 follow-up	91.2 baseline 76.0 follow-up
30-01-08				83.2 baseline 78.8 follow-up	91.2 baseline 76.0 follow-up
28-02-08*				83.2 baseline 80 follow-up	94.0 baseline 75.5 follow-up
20-03-08				83.2 baseline 80 follow-up	94.8 baseline 77.3 follow-up

*At the time of writing this paper, not all follow-up data was available.