by the market adoption of our Optical Networking Edge (ONE) solution and we expect to see growing  adoption of this solution in 2014 and beyond. Our  broadband success continues to be driven by sales of  the hi-X and the Total Access 5000 product families. Strengthening our channels to market remains a priority for the company. We successfully grew our  VAR program with the addition of over 300 new  resellers in 2013, bringing our total to approximately  3,800 partners. We also provided a range of new  products and services, for the VAR Channel, includ- ing our first cloud-based managed service offering,  that enabled our partners to develop new commercial  opportunities, expand addressable markets and win  new business for both themselves and ADTRAN.  In our ongoing focus to return value to our share- holders, we continued to reinvest in the company  through a stock buyback program. In May 2013, an  additional five million shares were added to this pro- gram. Throughout the year, the company repurchased  5.6 million shares of ADTRAN stock valued at $124.3  million. As of December 31, 2013, there were 3.5 mil- lion shares remaining under this program. From a product perspective, we reported growth  across all three of our core product segments. Internetworking led the way with 15 percent year- over-year growth, followed by Optical at seven  percent and Broadband Access at six percent. Our  success in Internetworking was fueled by contin- ued demand for our industry-leading IP Business  Gateways by service providers and Cable/MSOs, as  well as increased demand for our Ethernet switch  products through our Value-Added Reseller (VAR)  channel. Growth in our Optical products was helped  We were able to significantly increase our performance in 2013 in a number of key areas. From a market share perspective, we achieved the  number two position in global Broadband DSL aggregation revenue and the number two position in broadband revenue for our target markets of  North America and EMEA. 1  We continued to  diversify our customer mix and increased our global  penetration to 68 countries. An expanded customer  base and diversified customer mix will be essential  to the long-term, sustainable growth of the company.  International markets now account for 29 percent of  our total revenue, rising from just five percent in 2010. 1 Infonetics Research Shareholder’s Letter 9 GROW As a global market leader, ADTRAN is committed  to our investors, customers, and employees.