Year Distribution of Holdings in WoldCat’s most popular titles

	A	B	C	D
1	Year	Occurrences

2	2012	1288	Data from:	ftp://anonftp.oclc.org/pub/researchdata/worldcat/WorldCatMostHighlyHeld-2012-05-15.nt.gz
3	2011	14436	getting Numbers:	https://gist.github.com/4443013
4	2010	23747	Inspired by discussion:	http://kcoyle.blogspot.de/2013/01/oclc-top-50.html
5	2009	27114		The evaluation is based on the http://schema.org/datePublished and http://schema.org/copyrightYear predicates.
6	2008	30810	1168541	of those could be made sense of.
7	2007	32316
8	2006	32715
9	2005	34666
10	2004	35047
11	2003	35175
12	2002	34289
13	2001	31958
14	2000	34971
15	1999	34009
16	1998	32392
17	1997	30433
18	1996	28777
19	1995	26398
20	1994	25764
21	1993	24946
22	1992	23597
23	1991	22606
24	1990	22617
25	1989	21800
26	1988	21121
27	1987	20228
28	1986	19679
29	1985	19142
30	1984	18722
31	1983	17967
32	1982	17701
33	1981	16934
34	1980	16702
35	1979	16130
36	1978	16182
37	1977	15934
38	1976	15335
39	1975	14809
40	1974	14719
41	1973	15499
42	1972	15431
43	1971	15206
44	1970	15148
45	1969	14910
46	1968	15053
47	1967	13215
48	1966	12010
49	1965	11190
50	1964	10102
51	1963	9000
52	1962	8034
53	1961	6873
54	1960	6356
55	1959	5219
56	1958	4710
57	1957	4519
58	1956	3809
59	1955	3639
60	1954	3247
61	1953	3155
62	1952	3079
63	1951	2848
64	1950	2798
65	1949	2566
66	1948	2279
67	1947	2151
68	1946	1761
69	1945	1396
70	1944	1234
71	1943	1275
72	1942	1376
73	1941	1414
74	1940	1338
75	1939	1315
76	1938	1227
77	1937	1179
78	1936	1120
79	1935	1007
80	1934	904
81	1933	814
82	1932	834
83	1931	900
84	1930	932
85	1929	941
86	1928	929
87	1927	841
88	1926	722
89	1925	696
90	1924	598
91	1923	573
92	1922	506
93	1921	452
94	1920	378
95	1919	329
96	1918	279
97	1917	304
98	1916	310
99	1915	290
100	1914	284