rental and management operations new site revenue growth . during the year ended december 31 , 2014 , we grew our portfolio of communications real estate through the acquisition and construction of approximately 8450 sites . in a majority of our international markets , the acquisition or construction of new sites results in increased pass-through revenues ( such as ground rent or power and fuel costs ) and expenses . we continue to evaluate opportunities to acquire 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. .
how many new sites were in the us during 2012 to 2014?\\n
( 1 ) the majority of sites acquired or constructed in 2014 were in brazil , india and mexico ; in 2013 were in brazil , colombia , costa rica , india , mexico and south africa ; and in 2012 were in brazil , germany , india and uganda . 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 and power and fuel costs , some of which may be passed through to our tenants , as well as property taxes , repairs and maintenance . 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 2019 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 , however , 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 . 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 small percentage of our total revenues . non-gaap financial measures included in our analysis of our results of operations are discussions regarding earnings before interest , taxes , depreciation , amortization and accretion , as adjusted ( 201cadjusted ebitda 201d ) , funds from operations , as defined by the national association of real estate investment trusts ( 201cnareit ffo 201d ) and adjusted funds from operations ( 201caffo 201d ) . we define adjusted ebitda as net income before income ( loss ) on discontinued operations , net ; income ( loss ) on equity method investments ; income tax benefit ( provision ) ; other income ( expense ) ; gain ( loss ) on retirement of long-term obligations ; interest expense ; interest income ; other operating income ( expense ) ; depreciation , amortization and accretion ; and stock-based compensation expense . nareit ffo is defined as net income before gains or losses from the sale or disposal of real estate , real estate related impairment charges , real estate related depreciation , amortization and accretion and dividends declared on preferred stock , and including adjustments for ( i ) unconsolidated affiliates and ( ii ) noncontrolling interest. .