Webarc:Input Dataset Statistics

Original Data	English Wikipedia XML Dump created on April 25th 2007
Engineered Data	83 monthly snapshots between February 2001 ~ December 2007
Included in Each Snapshot	Most recent revision of each article as of the end of the month.
Number of Articles	2,077,745
Number of Revisions	16,618,497
Average Number of Revisions per Article	8
Average Lifespan per Revision	27.4 months
The Most Frequently-Updated Article	"Cannabis", "Chess", and "Sport" - 73 revisions each
The Least Frequently-Updated Article	"Buzz!! The Movie" and 317,126 others - 1 revision each

The following table shows the number of articles in each monthly snapshot. In each month, we separately counted the articles that were newly updated within the month, and the articles that were last updated in a previous month.

distinguished between the articles newly updated In the following table, February 2001 is short-written as month-001, March 2001 as month-002, ..., December 2007 as month-083.

Snapshot	Number of Carried-Over Articles	Number of Newly-Updated Articles	Total Number of Articles
month-001	0	23	23
month-002	21	160	181
month-003	179	212	391
month-004	385	670	1,055
month-005	1,046	186	1,232
month-006	1,207	349	1,556
month-007	1,534	695	2,229
month-008	2,163	1,190	3,353
month-009	3,266	1,917	5,183
month-010	4,972	1,939	6,911
month-011	6,364	2,491	8,855
month-012	8,129	2,277	10,406
month-013	8,626	3,408	12,034
month-014	10,145	3,669	13,814
month-015	12,149	2,890	15,039
month-016	13,197	3,797	16,994
month-017	13,967	5,192	19,159
month-018	15,825	6,291	22,116
month-019	17,560	10,200	27,760
month-020	21,135	16,112	37,247
month-021	29,871	28,525	58,396
month-022	52,325	10,311	62,636
month-023	51,434	27,957	79,391
month-024	71,448	13,466	84,914
month-025	76,908	12,617	89,525
month-026	81,189	13,327	94,516
month-027	85,235	14,343	99,578
month-028	87,799	17,513	105,312
month-029	87,679	23,705	111,384
month-030	92,631	26,438	119,069
month-031	102,220	23,983	126,203
month-032	109,987	24,068	134,055
month-033	116,297	24,339	140,636
month-034	119,494	29,287	148,781
month-035	125,761	33,126	158,887
month-036	133,969	34,961	168,930
month-037	137,032	46,191	183,223
month-038	139,282	63,119	202,401
month-039	153,382	66,120	219,502
month-040	164,852	70,693	235,545
month-041	150,747	101,445	252,192
month-042	186,426	84,940	271,366
month-043	201,801	88,208	290,009
month-044	213,105	95,792	308,897
month-045	230,877	99,329	330,206
month-046	208,679	146,893	355,572
month-047	239,545	140,840	380,385
month-048	289,942	111,292	401,234
month-049	310,721	109,583	420,304
month-050	309,097	136,095	445,192
month-051	311,723	162,419	474,142
month-052	332,785	171,091	503,876
month-053	346,613	189,980	536,593
month-054	362,863	215,235	578,098
month-055	387,670	233,548	621,218
month-056	430,610	227,345	657,955
month-057	438,169	263,848	702,017
month-058	477,553	266,604	744,157
month-059	462,758	326,800	789,558
month-060	484,083	356,435	840,518
month-061	536,424	349,439	885,863
month-062	535,708	400,751	936,459
month-063	574,904	409,781	984,685
month-064	605,089	430,124	1,035,213
month-065	646,905	439,811	1,086,716
month-066	674,061	472,054	1,146,115
month-067	699,421	510,847	1,210,268
month-068	776,674	485,047	1,261,721
month-069	806,557	506,063	1,312,620
month-070	833,026	530,075	1,363,101
month-071	882,059	531,460	1,413,519
month-072	895,075	571,286	1,466,361
month-073	956,064	561,065	1,517,129
month-074	982,413	587,120	1,569,533
month-075	1,024,155	597,422	1,621,577
month-076	1,068,145	604,626	1,672,771
month-077	1,133,363	605,840	1,739,203
month-078	1,188,351	634,385	1,822,736
month-079	1,233,461	654,324	1,887,785
month-080	1,306,141	629,149	1,935,290
month-081	1,329,029	654,937	1,983,966
month-082	1,405,930	621,105	2,027,035
month-083	1,441,438	636,307	2,077,745
total	30,070,825	16,618,497	46,689,322