ANC relationship to testing dates

[mmcleod89]

Update ANC conditions to depend on testing dates correctly

* RATE OF ATTENDING AN ANC FOR PREGNANT WOMEN; 

if gender=2 then do;
	if      date_start_testing le caldate{t} lt 2015    then prob_anc      = max(prob_anc, 0.1)+rate_anc_inc; * dependent_on_time_step_length ;
	if                            caldate{t} =  2014.75 then prob_anc_2015 = prob_anc;
	if                      	  caldate{t} ge 2015    then prob_anc      = prob_anc_2015;
	if prob_anc gt 0.975   then prob_anc=0.975;