Monthly recurring revenue per month, counted per customer: start, new, expansion, reactivation, contraction, churn and end (start + new + expansion + reactivation − contraction − churn = end), customers at start and end, new and churned customers, and revenue and customer churn rates (fractions; null when the month started at zero). From connected subscription sources (e.g. Stripe). get_metric gives mrr, mrr_churn_rate and net_new_mrr for the last complete month.