who had the highest usage rate in a season while averaging less than 15 ppg and playing 20 minutes per game

Ricky Pierce has the highest usage percentage with fewer than 15.0 points per game and 20.0+ minutes per game in a season, at 30.7 percent in 1993-94.

Interpreted as:

Who had the highest usage rate in a season while averaging less than 15 ppg and playing 20 or higher minutes per game?

	NAME	USG%	PPG	MPG	SEASON	TM	GP	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Ricky Pierce R. Pierce	30.7	14.5	20.0	1993-94	SEA	51	1.6	1.8	0.8	0.1	5.3	11.3	47.1	0.1	0.6	18.8	3.7	4.1	89.6	55.2	0.6	1.1	1.3	1,022	739	83	91	42	5	64	84
2	Alonzo Mourning A. Mourning	30.5	13.6	23.5	2000-01	MIA	13	7.8	0.9	0.3	2.4	5.6	10.8	51.8	0.0	0.1	0.0	2.4	4.2	56.4	53.6	2.7	5.1	2.2	306	177	101	12	4	31	28	24	+28
3	Corliss Williamson C. Williamson	29.7	13.6	21.8	2001-02	DET	78	4.1	1.2	0.6	0.3	5.3	10.3	51.0	0.0	0.1	20.0	3.1	3.8	80.5	56.7	1.5	2.6	1.8	1,701	1,063	319	94	49	26	137	226	+142
4	Zach Randolph Z. Randolph	29.3	14.1	24.5	2016-17	MEM	73	8.2	1.7	0.5	0.1	5.9	13.2	44.9	0.3	1.3	22.3	1.9	2.6	73.1	49.0	2.5	5.7	1.4	1,786	1,028	598	122	38	10	99	136	+75
5	Walter Davis W. Davis	29.1	14.4	21.5	1981-82	PHX	55	1.9	2.9	0.8	0.1	6.4	12.2	52.3	0.1	0.3	18.8	1.7	2.0	82.0	55.3	0.4	1.5	2.0	1,182	794	103	162	46	3	112	104
6	Ledell Eackles L. Eackles	29.1	13.5	21.7	1989-90	WAS	78	2.2	2.3	0.6	0.1	5.3	12.1	43.9	0.2	0.8	32.2	2.7	3.6	75.0	49.6	0.9	1.3	1.8	1,696	1,055	175	182	50	4	143	157
7	Billy Ray Bates B. Ray Bates	29.0	13.8	20.3	1980-81	POR	77	2.0	2.5	1.1	0.1	5.7	11.7	48.7	0.2	0.7	25.9	2.2	2.6	85.4	53.7	0.9	1.1	1.9	1,560	1,062	157	196	82	6	149	120
8	Pete Maravich P. Maravich	29.0	13.7	22.4	1979-80	TOT	43	1.8	1.9	0.6	0.1	5.7	12.6	44.9	0.2	0.3	66.7	2.1	2.4	86.7	50.0	0.4	1.4	1.9	964	589	78	83	24	6	82	79
9	Rik Smits R. Smits	28.9	14.9	25.9	1998-99	IND	49	5.6	1.1	0.4	1.1	6.3	12.9	49.0	0.0	0.0	0.0	2.2	2.7	81.8	52.7	1.5	4.1	1.5	1,271	728	275	52	18	52	75	159	+193
10	Dennis Schröder D. Schröder	28.8	11.0	20.3	2015-16	ATL	80	2.6	4.4	0.9	0.1	4.1	9.8	42.1	1.0	3.0	32.2	1.8	2.3	79.1	51.0	0.3	2.2	2.3	1,621	879	204	349	70	9	183	138	+225
11	Terry Teagle T. Teagle	28.8	12.6	20.4	1987-88	GSW	47	1.7	1.3	0.7	0.1	5.3	11.6	45.4	0.0	0.2	11.1	2.1	2.6	80.2	49.6	0.9	0.9	1.7	958	594	81	61	32	4	80	95
12	Kobe Bryant K. Bryant	28.7	13.8	29.5	2013-14	LAL	6	4.3	6.3	1.2	0.2	5.2	12.2	42.5	0.5	2.7	18.8	3.0	3.5	85.7	50.5	0.3	4.0	5.7	177	83	26	38	7	1	34	9	-32
13	Jerry Stackhouse J. Stackhouse	28.6	14.5	28.3	1998-99	DET	42	2.5	2.8	0.8	0.5	4.3	11.6	37.1	0.8	3.0	27.8	5.0	5.9	85.0	50.9	0.6	1.9	2.9	1,188	607	107	118	34	19	121	79	+22
14	Lester Hudson L. Hudson	28.6	10.9	20.9	2011-12	TOT	16	2.9	2.3	0.9	0.2	3.9	10.1	38.3	1.0	4.0	25.0	2.1	2.6	82.9	48.3	0.4	2.4	2.0	334	174	46	36	14	3	32	26	+2
15	David Thompson D. Thompson	28.4	14.9	20.4	1981-82	DEN	61	2.4	1.9	0.6	0.5	5.1	10.6	48.6	0.1	0.2	28.6	4.5	5.6	81.4	57.1	0.9	1.5	2.3	1,246	906	148	117	34	29	142	149
16	Jordan Crawford J. Crawford	28.1	14.7	27.4	2011-12	WAS	64	2.6	3.0	0.9	0.1	5.5	13.6	40.0	1.2	4.3	28.9	2.5	3.2	79.3	48.8	0.7	1.9	2.2	1,753	938	168	190	59	5	141	111	-291
17	Danny Manning D. Manning	28.0	13.4	24.7	1995-96	PHX	33	4.3	2.0	1.2	0.7	5.4	11.8	45.9	0.1	0.4	21.4	2.5	3.3	75.2	50.6	0.9	3.4	2.3	816	441	143	65	38	24	77	121
18	Jeremy Lin J. Lin	28.0	14.6	26.9	2011-12	NYK	35	3.1	6.2	1.6	0.3	4.9	10.9	44.6	0.7	2.1	32.0	4.2	5.2	79.8	55.2	0.5	2.5	3.6	940	512	107	216	55	9	126	78	+141
19	Eddie Johnson E. Johnson	27.9	14.4	22.8	1992-93	SEA	82	3.3	1.6	0.4	0.0	5.6	12.1	46.7	0.2	0.7	30.4	2.9	3.1	91.1	53.3	1.5	1.8	1.6	1,869	1,177	272	135	36	4	134	173
20	Ben Gordon B. Gordon	27.9	11.2	20.8	2012-13	CHA	75	1.7	1.9	0.5	0.2	4.1	10.1	40.8	1.5	3.9	38.7	1.4	1.7	84.3	51.5	0.2	1.5	1.8	1,560	840	130	141	35	16	136	134	-430
21	Larry Hughes L. Hughes	27.8	15.0	28.3	1999-00	TOT	82	4.3	2.5	1.4	0.3	5.6	14.0	40.0	0.4	1.5	23.2	3.4	4.6	74.0	46.7	1.4	2.9	2.4	2,324	1,226	349	205	115	28	195	191	-372
22	Michael Beasley M. Beasley	27.7	13.9	24.8	2008-09	MIA	81	5.4	1.0	0.5	0.5	5.6	11.8	47.2	0.4	1.0	40.7	2.3	3.0	77.2	52.8	1.4	4.1	1.5	2,009	1,123	439	83	41	37	121	184	+8
23	Michael Beasley M. Beasley	27.7	10.1	20.7	2012-13	PHX	75	3.8	1.5	0.4	0.5	4.1	10.2	40.5	0.6	1.9	31.3	1.3	1.7	74.6	46.2	0.7	3.1	1.9	1,554	759	282	111	31	34	144	107	-339
24	Jerryd Bayless J. Bayless	27.7	11.0	23.7	2016-17	PHI	3	4.0	4.3	0.0	0.0	3.7	10.7	34.4	0.7	1.7	40.0	3.0	3.3	90.0	45.3	1.0	3.0	3.0	71	33	12	13	0	0	9	4	-21
25	Zach Randolph Z. Randolph	27.6	14.5	25.6	2017-18	SAC	59	6.7	2.2	0.7	0.2	6.1	12.9	47.3	0.9	2.5	34.7	1.4	1.8	78.5	52.9	1.6	5.1	2.0	1,508	857	397	127	42	10	116	119	-351