I was mentally trying to do this. For BWI, the anomalies are on this order for 09-10 through 18-19 (I’m not actually confirming this, just ballpark)
09-10: +55”
10-11: -5”
11-12: -18”
12-13: -12”
13-14: +20”
14-15: +10”
15-16: +15”
16-17: -15”
17-18: -5”
18-19: -1”
So over that period, almost the entirely positive anomaly is driven by 09-10. Take that year out and it’s a little below normal over 10-11 through 18-19.