(5) Commitments and Contingencies Professional and General Liability and Workers Compensation Liability: Effective November, 2010, the vast majority of our subsidiaries are self-insured for professional and general liability exposure up to $10 million and $3 million per occurrence, respectively. These subsidiaries are provided with several excess policies through commercial insurance carriers which provide for coverage in excess of the applicable per occurrence self-insured retention (either $3 million or $10 million) or underlying policy limits up to $250 million per occurrence and in the aggregate for claims incurred after 2013 a nd up to $200 million per occurrence and in the aggregate for claims incurred from 2011 through 2013. We remain liable for 10% of the claims paid pursuant to the commercially insured coverage in excess of $10 million up to $60 million per occurrence and in the aggregate. In addition, from time to time based upon marketplace conditions, we may elect to purchase additional commercial coverage for certain of our facilities or businesses. Our behavioral health care facilities located in the U.K. have policies through a commercial insurance carrier located in the U. K. that provides for 10 million of professional liability coverage and 25 million of general liability coverage. Our estimated liability for self-insured professional and general liability claims is based on a number of factors including, among other things, the number of asserted claims and reported incidents, estimates of losses for these claims based on recent and historical settlement amounts, estimates of incurred but not reported claims based on historical experience, and estimates of amounts recoverable under our commercial insurance policies. While we continuously monitor these factors, our ultimate liability for professional and general liability claims could change materially from our current estimates due to inherent uncertainties involved in making this estimate. Given our significant self-insured exposure for prof