Table 2. Number of hospitals issuing quality control reports and number of hospitals performing at least one of the six classes of intervention with minimum caseload requirements in the period 2004 to 2010.

	2004	2006	2008	2010
Hospitals with quality control report	1983	1940	1922	1871
Hospitals with at least one MV class, uncorrected	485	1018	1047	1071
Hospitals with at least one MV class, corrected (% of all hospitals with quality control reports)	481 (24%)	1007 (52%)	1032 (54%)	1055 (56%)
Inpatient admissions in Germany	16 801 649	16 832 883	17 519 579	18 026 451
Case numbers of the six MV intervention classes according to quality control reports (% of all cases)	22 064 (0.1%)	143 012 (0.8%)	166 361 (0.9%)	170 801 (0.9%)

MV, minimum volumes