Category	Heard	PPB	Easy %	Medium %	Hard %
Art - Music/Opera	123	13.25	88%	37%	7%
Art - Other	71	13.52	85%	44%	7%
Art - Painting/Sculpture	118	15.85	96%	50%	13%
Art - Visual	45	12.89	87%	36%	7%
Current Events/Modern World - Mixed/Any	9	13.33	89%	44%	0%
Current Events/Modern World - Rest of world political	9	16.67	100%	56%	11%
Current Events/Modern World - Rest of world social	8	8.75	88%	0%	0%
Current Events/Modern World - United States political	1	20.00	100%	100%	0%
Current Events/Modern World - United States social	8	10.00	100%	0%	0%
Current Events/Modern World - Western social	9	11.11	100%	11%	0%
Geography - Europe	9	20.00	100%	78%	22%
Geography - Mixed/any	9	18.89	100%	56%	33%
Geography - Non-U.S. Americas	9	17.78	100%	78%	0%
Geography - Oceania/Pacific	9	21.11	100%	78%	33%
Geography - United States	9	13.33	78%	44%	11%
History - American	114	16.93	98%	58%	13%
History - European	114	15.70	93%	52%	12%
History - Other	107	14.21	94%	40%	8%
History - World	123	14.47	96%	36%	13%
Literature - American any	17	16.47	100%	59%	6%
Literature - American drama	1	10.00	100%	0%	0%
Literature - American long fiction	36	15.28	94%	50%	8%
Literature - American poetry	44	13.86	82%	43%	14%
Literature - American short fiction	9	13.33	89%	22%	22%
Literature - British any	18	13.89	100%	33%	6%
Literature - British drama	18	14.44	94%	44%	6%
Literature - British long fiction	29	17.93	93%	66%	21%
Literature - British poetry	34	15.59	97%	44%	15%
Literature - British short fiction	14	15.00	93%	43%	14%
Literature - European any	16	14.38	94%	44%	6%
Literature - European drama	15	22.00	100%	87%	33%
Literature - European long fiction	54	15.37	83%	61%	9%
Literature - European poetry	27	15.93	100%	44%	15%
Literature - European short fiction	9	14.44	89%	44%	11%
Literature - World/Misc any	24	18.75	100%	67%	21%
Literature - World/Misc drama	4	17.50	75%	50%	50%
Literature - World/Misc long fiction	44	15.91	100%	57%	2%
Literature - World/Misc poetry	26	17.69	96%	69%	12%
Literature - World/Misc short fiction	17	17.06	88%	71%	12%
Mythology - Americas	10	13.00	90%	30%	10%
Mythology - Egyptian	18	13.33	72%	50%	11%
Mythology - Greco/Roman	44	15.45	93%	50%	11%
Mythology - Hindu	8	20.00	100%	63%	38%
Mythology - Mixed/Any	27	15.19	100%	48%	4%
Mythology - Norse	7	12.86	100%	14%	14%
Other Academic/Cross-Category - Any	33	15.76	94%	52%	12%
Philosophy - 20th century	18	13.33	72%	33%	28%
Philosophy - Ancient	18	18.33	100%	78%	6%
Philosophy - Enlightenment	19	15.26	95%	47%	11%
Philosophy - Medieval	8	12.50	88%	38%	0%
Philosophy - Mixed/Any	27	12.59	93%	26%	7%
Philosophy - Pre-20th	27	11.85	100%	19%	0%
Religion - Buddhism	10	12.00	90%	30%	0%
Religion - Christianity/Judaism	32	15.00	94%	50%	6%
Religion - Hinduism	25	10.80	84%	24%	0%
Religion - Islam	21	15.24	95%	52%	5%
Religion - Mixed/Any	25	10.00	72%	24%	4%
Science - Astronomy	9	20.00	100%	56%	44%
Science - Biology	109	14.31	86%	44%	13%
Science - Chemistry	116	15.26	87%	49%	16%
Science - Compsci	27	19.26	100%	70%	22%
Science - Earth	18	16.11	83%	61%	17%
Science - Engineering	7	20.00	100%	100%	0%
Science - Other	47	18.09	94%	66%	21%
Science - Other/CL/Misc	9	13.33	89%	33%	11%
Science - Physics	115	14.87	93%	44%	12%
Social Science - Anthropology	18	9.44	50%	33%	11%
Social Science - Economics	36	10.28	78%	22%	3%
Social Science - Law	8	10.00	88%	13%	0%
Social Science - Linguistics	8	11.25	88%	25%	0%
Social Science - Mixed/Any	18	8.89	44%	33%	11%
Social Science - Psychology	26	16.54	100%	50%	15%
Social Science - Sociology	9	7.78	56%	22%	0%