Those data have been archived to keen our site running fast. (Just like banks archives past 3 months data). We may allow access in future, but its best you do a screenshot next time.
Yes it is understandable given the concern over site speed. However, i believe 3 months is a bit short. Will it be possible to reinstate data of say, 24 historical months? If that is too long, perhaps 18 or 12 months.