Original sentence: According to a São Paulo newspaper, the city itself ranks 493th in the list of the 5565 most violent cities in Brazil, but ranks second in the number of firearm-related deaths.Additionaly, crime rates overall have been steadily decreasing for the past 8 years.Crime rates and gang violence are still high, especially in the numerous city slums and peripheral neighbourhoods.The number of murders state-wide in 2007 was 63% lower than it was in 1999,  one-quarter of that in Rio de Janeiro state
Edited sentence: Additionaly, crime rates, especially homicide, have been steadily decreasing for 8 years.. The number of murders in 2007 was 63% lower than it was in 1999.Crime rates and gang violence are relatively high, especially in the numerous city slums and peripheral neighbourhoods.However, the violence is somewhat overestimated.São Paulo ranks 493th in the list of the most violent cities in Brazil , with murder rates substantially lower than metropolis such as Rio de Janeiro, Belo Horizonte and Curitiba