Category	Heard	PPB	Easy %	Medium %	Hard %
Current Events	196	15.51	94%	48%	13%
Fine Arts - Classical Music	684	14.15	88%	44%	10%
Fine Arts - Other Fine Arts	650	13.32	89%	34%	10%
Fine Arts - Painting and Sculpture	623	14.21	90%	44%	8%
Geography	169	15.27	93%	47%	12%
History - American History	627	15.04	91%	47%	13%
History - European History	668	17.26	96%	53%	24%
History - Other History	687	13.16	93%	30%	9%
History - World History	671	14.66	94%	41%	12%
Literature - American Literature	651	13.53	85%	38%	12%
Literature - British Literature	636	14.61	88%	48%	11%
Literature - European Literature	706	14.21	89%	42%	12%
Literature - World Literature	734	14.74	89%	43%	15%
Mythology	680	15.29	97%	44%	13%
Other Academic	127	18.03	99%	65%	16%
Philosophy	628	14.14	90%	42%	10%
Pop Culture	123	15.61	85%	54%	18%
Religion	659	13.17	87%	33%	11%
Science - Biology	699	13.92	92%	37%	11%
Science - Chemistry	633	12.37	81%	35%	8%
Science - Other Science	649	13.10	78%	42%	11%
Science - Physics	687	13.16	84%	38%	9%
Social Science	650	14.12	92%	40%	9%