Simple Answer
a = get(gca,'Children');
RunDates = get(a(9), 'XData');
ylddata = get(a(9), 'YData');
gswdata = get(a(10), 'YData');
termdata = get(a(11), 'YData');
C = {RunDates' ylddata' gswdata' termdata'};
TERMYld = C{1,4};
GSWYld = C{1,3};
YLD = C{1,2};
RunDates = C{1,1};
T = table(RunDates,YLD,GSWYld,TERMYld);