To help capitalize the company, former President Vicente Fox brought forward the possibility of making shares of Pemex available to Mexican citizens and pension funds, to complement a current project-specific investment setup known as "Proyectos de Inversión Diferida En El Registro del Gasto" (Deferred Investment Projects in the Expenditure Registry); this proposal, along with alleviating Pemex's heavy tax burden and a substantial budget increase, have met opposition in Congress. President Felipe Calderón made clear at the beginning of his presidency that he would try his best to open up the sector to private investment. Pemex is Latin America's second-largest company measured by revenues, according to a ranking of the region's 500 largest companies by Latin Business Chronicle, behind Brazilian oil company Petrobras. In June 2009, Pemex has asked for an extra $1.5 billion state aid to finance oil fields investments, reported Bloomberg.