continue to be deployed as wireless service providers are beginning their investments in 3g data networks . similarly , in ghana and uganda , wireless service providers continue to build out their voice and data networks in order to satisfy increasing demand for wireless services . in south africa , where voice networks are in a more advanced stage of development , carriers are beginning to deploy 3g data networks across spectrum acquired in recent spectrum auctions . in mexico and brazil , where nationwide voice networks have also been deployed , some incumbent wireless service providers continue to invest in their 3g data networks , and recent spectrum auctions have enabled other incumbent wireless service providers to begin their initial investments in 3g data networks . in markets such as chile , peru and colombia , recent or anticipated spectrum auctions are expected to drive investment in nationwide voice and 3g data networks . in germany , our most mature international wireless market , demand is currently being driven by a government-mandated rural fourth generation network build-out , as well as other tenant initiatives to deploy next generation wireless services . we believe incremental demand for our tower sites will continue in our international markets as wireless service providers seek to remain competitive by increasing the coverage of their networks while also investing in next generation data networks . rental and management operations new site revenue growth . during the year ended december 31 , 2012 , we grew our portfolio of communications real estate through acquisitions and construction activities , including the acquisition and construction of approximately 8810 sites . in a majority of our international markets , the acquisition or construction of new sites results in increased pass-through revenues and expenses . we continue to evaluate opportunities to acquire larger communications real estate portfolios , both domestically and internationally , to determine whether they meet our risk adjusted hurdle rates and whether we believe we can effectively integrate them into our existing portfolio. .
in 2012 , what percent of new sites were foreign?
( 1 ) the majority of sites acquired or constructed in 2012 were in brazil , germany , india and uganda ; in 2011 were in brazil , colombia , ghana , india , mexico and south africa ; and in 2010 were in chile , colombia , india and peru . network development services segment revenue growth . as we continue to focus on growing our rental and management operations , we anticipate that our network development services revenue will continue to represent a relatively small percentage of our total revenues . through our network development services segment , we offer tower-related services , including site acquisition , zoning and permitting services and structural analysis services , which primarily support our site leasing business and the addition of new tenants and equipment on our sites , including in connection with provider network upgrades . rental and management operations expenses . direct operating expenses incurred by our domestic and international rental and management segments include direct site level expenses and consist primarily of ground rent , property taxes , repairs and maintenance , security and power and fuel costs , some of which may be passed through to our tenants . these segment direct operating expenses exclude all segment and corporate selling , general , administrative and development expenses , which are aggregated into one line item entitled selling , general , administrative and development expense in our consolidated statements of operations . in general , our domestic and international rental and management segments selling , general , administrative and development expenses do not significantly increase as a result of adding incremental tenants to our legacy sites and typically increase only modestly year-over-year . as a result , leasing additional space to new tenants on our legacy sites provides significant incremental cash flow . we may incur additional segment selling , general , administrative and development expenses as we increase our presence in geographic areas where we have recently launched operations or are focused on expanding our portfolio . our profit margin growth is therefore positively impacted by the addition of new tenants to our legacy sites and can be temporarily diluted by our development activities. .