The primary sector dominates the Togolese economy, contributing 38% to gross domestsic product (GDP) in 2012, ahead of the tertiary sector (23%) and secondary sector (21%). Agriculture as a share of GDP remains a mainstay of the sector at 27%. Estimated growth of 5.0% for 2012 will come mainly from the primary and secondary sectors, in particular cotton, phosphate, and construction and public works, up from 2011. Together, these two sectors added 4.1% to real growth in 2012 (1.6% and 2.5% respectively), compared to 2.8% in 2011 (1.9% and 0.9% respectively). A public investment programme continues, which includes investment in roads and, combined with the revival of the phosphate and cotton sectors, is expected to support growth in 2013 and 2014, which could reach 5.3% and 5.5% respectively.