Social Map save past data

[noamoss]

update data structure to include past data (archive) per organization. We need to have the archive of past data (in year resolution) of the followings:

• annual turnover
• number of workers
• number of volunteers
• Nihul Takin
• Salaries

We can integrate the archiving process in real time (what the specific entry is being updated) or once a month. It would be better to keep a whole snapshot of all relevant entries in a certain point of time, to avoid misunderstandings and adjustments in data interpretation.