Operator: Good day ladies and gentlemen, and welcome to the Amazon.com Q4 2013 Financial Results Teleconference. At this time, all participants are in a listen-only mode. After the presentation, we will conduct a question-and-answer session. Today's conference is also being recorded.
Now for opening remarks, I will turn the call over to the Senior Manager of Investor Relations, Dave Fildes. Please go ahead, sir.
Dave Fildes - Senior Manager of IR: Hello and welcome to our Q4 2013 financial results conference call. Joining us today is Tom Szkutak, our CFO. We will be available for questions after our prepared remarks. The following discussion and responses to your questions reflect management's views as of today, January 30, 2014 only and will include forward-looking statements.
Actual results may differ materially. Additional information about factors that could potentially impact our financial results is included in today's press release and our filings with the SEC, including our most recent Annual Report on Form 10-K. As you listen to today's conference call, we encourage you to have our press release in front of you which includes our financial results as well as metrics and commentary on the quarter.
During this call, we will discuss certain non-GAAP financial measures. In our press release, slides accompanying this webcast and our filings with the SEC, each of which is posted on our IR website. You'll find additional disclosures regarding these non-GAAP measures including reconciliations of these measures with comparable GAAP measures.
Finally, unless otherwise stated, all comparisons in this call will be against our results for the comparable period of 2012.
Now, I'll turn the call over to Tom.
Thomas J. Szkutak - SVP and CFO: Thanks, Dave. I'll begin with comments on our fourth quarter financial results. Trailing 12-month operating cash flow increased 31% to $5.47 billion. Trailing 12-month free cash flow increased to $2.03 billion. Trailing 12-month capital expenditures were $3.44 billion. The increase in capital expenditures reflects additional investment in support of continued business growth, consisting of additional capacity to support our fulfillment operations and investments in technology infrastructure including Amazon Web Services.
Return on invested capital was 13%, up from 4%. ROIC is TTM free cash flow divided by average total assets minus current liabilities excluding the current portion of long-term debt over five quarter ends. The combination of common stock and stock-based awards outstanding was 476 million shares compared with 470 million shares one year ago.
Worldwide revenue grew 20% to $25.59 billion or 22% excluding the $258 million unfavorable impact from year-over-year changes in foreign exchange.
Media revenue increased to $7.23 billion up 11% or 13% excluding foreign exchange. EGM revenue increased to $17.13 billion up 23% or 24% excluding foreign exchange. Worldwide EGM increased to 67% of worldwide sales up from 65%.
Worldwide paid unit growth was 25%. Active customer accounts exceeded 237 million worldwide active seller accounts were more than 2 million. Seller units represented 39% of paid units.