Measuring the growth of LibreOffice developer's base

Measuring the growth of LibreOffice developer's base

LibreOffice forked the OOo code betting on the growth of the first 20 developers. Thanks to a number of strategic moves, the project managed to attract 80 new developers during the first month, and 3 or more new developers each month for 44 months in a row. How we have measured the growth to motivate additional developers to join the project.