Table 6. Number of retractions and published articles listed in PubMed since 1970^*.

Year	Number of retractions	Number of items indexed	Retractions per 1,000 items (%)
2010–2012	294	2,385,130	12.33
2000–2009	1482	6,468,664	22.91
1990–1999	349	4,390,650	7.95
1980–1989	131	3,299,814	3.97
1970–1979	25	2,447,305	1.02

^*Search performed on August 28, 2012.