 Cardoso was also criticized for amending the constitution to his own benefit, allowing him to stay eight years in office.His popularity in his first four years, gained with the success of Plano Real, decreased during his last four years as the currency crisis was followed by lower economic growth and employment rates, greater public debt, growing political dissent, low levels of investment in appropriate infrastructure, and, finally, an energy crisis caused by an unexpected drought, as over 80% of Brazil's electricity is hydroelectric.He publicly admitted that he could have done more for public security and for the creation of new jobs, but defended his policies in areas such as health and education.