which team has allowed least goals in a month with 15 games since 2012

Since 2011-12, the St. Louis Blues have allowed the fewest goals by a team when playing 15+ games in a month, with 22 allowed in April 2013.

Interpreted as:

Which team has allowed least goals in a month with 15 or more games since 2012?

	TEAM	GA	GP	MONTH	W	L	OTL	PTS	PTS%	SOW	SOL	G	DIFF	PP%	PK%	S/GP	S%	SA/GP	SV%
1	Blues	22	15	April 2013	12	3	0	24	.800	3	0	32	10	11.9	92.1	26.53	8.0	24.53	.940
2	Stars	23	15	March 2019	9	4	2	20	.667	1	2	37	14	21.6	88.9	32.80	7.5	31.00	.951
3	Blues	23	15	March 2017	11	2	2	24	.800	0	1	42	19	19.4	85.7	30.40	9.2	28.40	.946
4	Blues	25	15	March 2012	8	4	3	19	.633	0	3	38	13	21.3	93.3	29.40	8.6	27.93	.940
5	Devils	26	15	November 2013	8	6	1	17	.567	0	1	33	7	14.6	91.1	23.60	9.3	23.80	.927
6	Penguins	26	15	March 2013	15	0	0	30	1.000	1	0	52	26	17.9	82.9	30.47	11.4	28.87	.940
7	Blues	26	15	February 2012	11	4	0	22	.733	3	0	39	13	26.3	87.2	29.40	8.8	26.07	.934
8	Rangers	27	15	March 2015	10	4	1	21	.700	1	0	38	11	9.1	90.5	31.20	8.1	30.47	.941
9	Bruins	27	17	March 2014	15	1	1	31	.912	2	1	59	32	21.1	89.1	32.59	10.6	29.41	.946
10	Golden Knights	28	15	April 2021	11	3	1	23	.767	1	1	54	26	15.9	89.2	35.33	10.2	28.60	.935
11	Lightning	28	15	February 2019	12	1	2	26	.867	3	1	49	21	27.7	92.2	29.80	11.0	32.53	.943
12	Flyers	28	16	March 2012	11	3	2	24	.750	2	2	46	18	21.3	91.7	29.25	9.8	27.19	.936
13	Penguins	29	16	March 2021	12	3	1	25	.781	0	0	57	28	28.3	85.7	29.94	11.9	31.06	.942
14	Avalanche	29	15	February 2020	11	3	1	23	.767	1	0	41	12	18.2	86.0	30.87	8.9	30.33	.936
15	Bruins	29	15	November 2016	8	6	1	17	.567	1	1	36	7	20.9	87.0	34.87	6.9	25.93	.925
16	Sharks	29	15	November 2016	8	6	1	17	.567	0	0	35	6	14.0	83.9	30.93	7.5	26.33	.927
17	Jets	29	15	November 2014	8	4	3	19	.633	2	1	30	1	14.3	85.7	30.27	6.6	29.60	.935
18	Sharks	29	15	January 2014	9	6	0	18	.600	2	0	33	4	13.9	89.2	32.80	6.7	25.80	.925
19	Rangers	29	15	November 2013	9	6	0	18	.600	0	0	40	11	18.5	88.1	31.47	8.5	28.53	.932
20	Blue Jackets	30	16	March 2017	10	4	2	22	.688	0	1	38	8	11.1	84.4	30.50	7.8	31.81	.941
21	Kings	30	15	March 2014	11	4	0	22	.733	2	0	42	12	20.4	85.1	33.33	8.4	25.20	.921
22	Rangers	30	15	January 2014	10	4	1	21	.700	0	1	49	19	18.8	79.5	35.53	9.2	31.07	.936
23	Rangers	30	15	December 2011	10	4	1	21	.700	0	1	47	17	15.7	88.6	29.27	10.7	28.33	.929
24	Hurricanes	31	15	March 2024	11	3	1	23	.767	1	1	56	25	25.0	91.8	34.93	10.7	27.47	.925
25	Bruins	31	15	March 2023	11	4	0	22	.733	1	0	51	20	14.5	85.5	32.60	10.4	29.27	.929