Show me the ladder when margin under 15

Ladder when margin is under 15. GWS is ranked first with a record of 6-1-0 from 7 games

#	Team	P	W	L	D	Win %	PF	PA	Home W-L	Away W-L
1	GWS	7	6	1	0	85.71	89.00	85.57	undefined-undefined	undefined-undefined
2	PTA	9	7	2	0	77.78	77.11	75.22	undefined-undefined	undefined-undefined
3	GCS	8	5	3	0	62.50	81.63	78.38	undefined-undefined	undefined-undefined
4	GEE	8	5	3	0	62.50	85.88	83.00	undefined-undefined	undefined-undefined
5	ESS	10	6	3	1	60.00	85.80	83.40	undefined-undefined	undefined-undefined
6	BRI	7	4	2	1	57.14	88.71	84.57	undefined-undefined	undefined-undefined
7	HAW	7	4	3	0	57.14	80.14	76.86	undefined-undefined	undefined-undefined
8	COL	11	6	3	2	54.55	85.27	85.82	undefined-undefined	undefined-undefined
9	NTH	6	3	3	0	50.00	88.83	86.00	undefined-undefined	undefined-undefined
10	STK	11	5	6	0	45.45	69.00	69.18	undefined-undefined	undefined-undefined
11	MEL	7	3	4	0	42.86	75.86	74.71	undefined-undefined	undefined-undefined
12	CAR	12	4	8	0	33.33	84.50	88.58	undefined-undefined	undefined-undefined
13	SYD	6	2	4	0	33.33	87.50	86.33	undefined-undefined	undefined-undefined
14	RIC	6	2	4	0	33.33	75.50	79.50	undefined-undefined	undefined-undefined
15	WCE	6	2	4	0	33.33	82.67	87.17	undefined-undefined	undefined-undefined
16	WBD	4	1	3	0	25.00	92.50	95.25	undefined-undefined	undefined-undefined
17	ADE	9	2	6	1	22.22	83.33	87.00	undefined-undefined	undefined-undefined
18	FRE	8	1	6	1	12.50	77.13	82.88	undefined-undefined	undefined-undefined