Financial Information
9. SELF-INSURANCE RESERVE FOR LOSSES AND LOSS ADJUSTMENT EXPENSES
The following table summarizes the activity in our self-insurance reserve for losses and loss adjustment expenses as of year-end 2014 and 2013:
Our provision for incurred losses relating to the current year increased by $10 million over 2013 primarily due to an increase in medical benefit costs and growth in business activity. Our provision for incurred losses relating to prior years decreased by $2 million in 2014 and increased by $8 million in 2013 as a result of changes in estimates from insured events from prior years due to changes in underwriting experience and frequency and severity trends. Our year-end 2014 self-insurance reserve of $384 million consisted of a current portion of $120 million and noncurrent portion of $264 million. Our year-end 2013 self-insurance reserve of $362 million consisted of a current portion of $120 million and noncurrent portion of $242 million.