Count of veteran users per month

0) How many users you get a month? A) I counted the users who joined and are still active.

Grouped by month, we sum the users who are still active today.
Active means a last_activity since 3 months.
Only users with score>0 are counted. Also the botflag is checked.

MonthYearStill active users.
Feb20083
Mar20089
Apr20087
May20080
Jun20081
Jul20080
Aug20080
Sep20081
Oct20081
Nov20083
Dec20080
Jan20094
Feb20095
Mar20095
Apr20092
May20092
Jun20092
Jul20096
Aug20092
Sep20092
Oct20093
Nov20095
Dec20090
Jan20103
Feb20101
Mar20101
Apr20102
May20102
Jun20100
Jul20101
Aug20102
Sep20102
Oct20100
Nov20102
Dec20104 (RootMe joined)
Jan20112
Feb20111
Mar20111
Apr20115
May20112
Jun20114
Jul20114
Aug20112
Sep20112
Oct20110
Nov20114
Dec20110
Jan20121
Feb20124
Mar20127
Apr20123
May20125
Jun20121
Jul20122
Aug20122
Sep20121
Oct20123
Nov20126
Dec20124
Jan20134
Feb20133 (OTW joined)
Mar20133
Apr20133
May20133
Jun20132
Jul20134
Aug20132
Sep20135
Oct201313
Nov20136
Dec20131
Jan20144
Feb201410
Mar20146
Apr20148
May20147
Jun20146
Jul20148
Aug20146
Sep20148
Oct201412
Nov20149
Dec20146
Jan201510
Feb20157
Mar20151 (hospital downtime)
Apr20159
May20158
Jun201514
Jul20156
Aug20156
Sep201511
Oct201512
Nov201512
Dec20159
Jan20164
Feb201620
Mar20168
Apr201613
May201613
Jun201614
Jul201614
Aug201622
Sep201612
Oct201610
Nov201619
Dec201619
Jan201720
Feb201721
Mar201716
Apr201720
May201733
Jun201727
Jul201727
Aug201747
Sep201740
Oct201754
Nov2017261
Dec2017132
Jan2018277
Feb201875

This gives us a total of around 1611 total active users currently... maybe subtract 300 for those who will quit soon?