Last dated monuments at 89 Maya cities, 711 to 910
Ebert et al. 2014, Table 1. Counts by 20 years: 700-719 4, 720-739 1, 740-759 6, 760-779 10, 780-799 21, 800-819 9, 820-839 9, 840-859 10, 860-879 10, 880-899 6, 900-919 3. Monuments were mostly raised on fixed calendar dates (every 5, 10 or 20 years), so a 'last date' is coarse and only the last surviving one.