The FMCSA statistics were compiled Nov 2010 by Carrier411.com:

Carriers with deficient Driver Safety (DRSEA) scores:

 

17,880

Carriers with deficient Vehicle Safety (VHSEA) scores: 19,054
Carriers with deficient Safety Management (SMSEA) scores: 6,421
Carriers with unsatisfactory carrier safety ratings: 1,717
Carriers with conditional carrier safety ratings: 14,614
Carriers with satisfactory carrier safety ratings: 64,222
Active carriers operating with no liability insurance: 1,060
Active carriers operating with insufficient cargo insurance: 3,333
Active carriers operating with insufficient liability insurance: 1,089
Motor carriers with active authority: 181,368
Motor carriers with inactive authority: 305,757
Motor carriers pending revocation of authority: 8,688
Motor carriers pending new authority: 8,470