Given concerns about population growth, China implemented a two-child limit during the 1970s, and, in 1979, began to advocate for an even stricter limit of one child per family. Beginning in the mid 1980s, however, given the unpopularity of the strict limits, China began to allow some major exemptions, particularly in rural areas, resulting in what was actually a "1.5"-child policy from the mid-1980s to 2015 (ethnic minorities were also exempt from one child limits). The next major loosening of the policy was enacted in December 2013, allowing families to have two children if one parent is an only child. In 2016, the one-child policy was replaced in favor of a two-child policy. Data from the 2010 census implies that the total fertility rate may be around 1.4, although due to under-reporting of births it may be closer to 1.5–1.6.