--- tags: book-section --- ## Statistics ### Target ![](https://i.imgur.com/Nw4ftem.png) --- ### Quarterly Growth ![](https://i.imgur.com/IQdOdmc.png) --- :clock1030: A beginner, after ~30 minutes of on-boarding, may take **~8** minutes to map the recommended minimum features. (Experienced mappers: ~4 minutes) :calendar: With 33,942 schools to validate, the effort is expected to take 566 working days to complete. Note: Calculating using the past average rate (~1,800 schools added per year), it would take the community 15 years to validate the remaning 24,560 At 5,000 schools per year, 5 years. --- ![](https://i.imgur.com/pzliz8U.png) Note: ### Diffs | Calendar Year | Period | [Cumulative](http://overpass-turbo.eu/s/OIz) | Diff, period | Yearly Total | |---|---|---:|---:|---:| | 2020 | Q1 | 23,473 | +2,691 | ++2,691++ | | 2019 | Q4 | 20,782 | +2,139 | **4,337** | | | Q3 | 18,643 | +413 | | | | Q2 | 18,230 | +705 | | | | Q1 | 17,525 | +1,080 | | | 2018 | Q4 | 16,445 | +1,570 | **2,241** | | | Q3 | 14,875 | +523 | | | | Q2 | 14,352 | +323 | | | | Q1 | 14,029 | -175 | | | 2017 | Q4 | 14,204 | +286 | **1,897** | | | Q3 | 13,918 | +369 | | | | Q2 | 13,549 | +564 | | | | Q1 | 12,985 | +678 | | | 2016-12-31 | | 12,307 | | ++2,448++ | | 2015-12-31 | | 9,859 | | ++922++ | | 2014-12-31 | | 8,937 | | ++1,503++ | | 2013-12-31 | | 7,434 | | ++1,868++ | | 2012-12-31 | | 5,566 | | - |