There are also significant variations among types of users within the same city. In most cities, industrial and commercial users pay significantly more for water services than domestic users - in Mexicali, an extreme case, almost six times as much. In many cities, tariffs are increasing above inflation rates. In 2006-2007, in a sample of 32 cities, water tariffs increased above inflation (3.8%) in 22 cities - in 4 cities the increase was below inflation, in 5 cities there was no increase and in 1 city there was a decrease (CONAGUA, 2008).