Table 4: CRS relative efficiency observed in Iranian insurance companies in percent (%): 2003–2010; DEA with certain and uncertain outputs (traditional DEA versus robust DEA).

DMUs Year 2003 2004 2005 2006 2007 2008 2009 2010 Certain outputs Uncertain outputs Certain outputs Uncertain outputs Certain outputs Uncertain outputs Certain outputs Uncertain outputs Certain outputs Uncertain outputs Certain outputs Uncertain outputs Certain outputs Uncertain outputs Certain outputs Uncertain outputs DMU1a 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 DMU2a 100 100 100 100 100 100 100 100 100 100 100 100 100 100 71 67 DMU3a 100 100 100 100 100 100 68 68 100 100 100 100 100 100 100 100 DMU4a 46 46 51 45 72 61 56 42 64 64 71 71 74 73 60 53 DMU5 41 41 69 33 26 14 27 20 56 51 35 34 70 64 97 92 DMU6 100 88 71 58 100 99 79 79 75 74 79 78 100 100 100 100 DMU7 70 60 67 61 57 57 66 64 98 98 100 90 87 77 69 68 DMU8 86 71 100 100 86 81 100 100 100 53 100 58 100 100 100 100 DMU9 32 31 49 42 55 55 51 26 51 28 54 54 53 47 44 29 DMU10 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 DMU11 100 94 100 78 100 44 100 62 65 31 52 38 44 33 52 21 DMU12 100 100 100 100 100 71 100 33 100 97 100 74 100 100 100 100 DMU13 100 100 63 56 54 50 79 78 95 95 100 100 100 100 100 100 DMU14     92 46 21 6 68 57 100 100 100 100 100 100 100 100 DMU15         100 100 100 100 100 100 100 88 100 92 100 76 DMU16         34 22 73 57 97 96 100 100 100 64 74 69 DMU17         100 55 61 53 43 34 58 52 72 49 51 35 DMU18             77 52 69 40 52 24 64 30 69 33 DMU19                     62 48 64 46 53 30 DMU20                         100 100 100 36 Average 83 79 83 73 77 65 78 66 84 76 82 74 86 79 82 70 Standard deviation 26 26 20 27 29 32 21 27 21 29 23 26 19 26 21 30

aState-owned insurers.