When birth rates in industrial nations tapered off during the 1960s, infant formula companies heightened marketing campaigns in non-industrialized countries. Unfortunately, poor sanitation led to steeply increased mortality rates among infants fed formula prepared with contaminated (drinking) water.[96] Additionally, low-income families may over-dilute in an effort to "stretch" supplies resulting in malnourishment for the infant.[97] Organized protests, the most famous of which was the Nestlé boycott of 1977, called for an end to unethical marketing.