This 'liberated' system persisted even during Cuba's period of economic growth and relative prosperity during the early and mid 2010s and enjoyed considerable popularity among the island's citizens. Cuba later re-introduced a classical limiting rationing system in 2019, following the imposition of strict sanctions on the island by US President Donald Trump, as well as the collapse of petroleum shipments from Venezuela, which was facing its own economic troubles at that time. Cuba's president pitched the new system as significantly more lenient than the 1991-2000 "special period", though admitted that it would negatively affect consumption. Short-term rationing for gas and other fuels was introduced in the U.S. states of New Jersey and New York following Hurricane Sandy in 2012. In April 2019, Venezuela announced a 30-day electricity rationing regime in the face of power shortages. For a few years during a series of droughts in California (from 2015 to 2019), the California State Water Resources Control Board had mandatory water-use restrictions. In 2021, Sri Lanka, facing a major economic crisis, is considering introducing food rationing. According to The Hindu, "President Gotabaya Rajapaksa has called in the army to manage the crisis by rationing the supply of various essential goods." Refugee aid rations Aid agencies, such as the World Food Programme, provide food rations and other essentials to refugees or internally displaced persons who are registered with the UNHCR and are either living in refugee camps or are supported in urban centres. Every registered refugee is given a ration card upon registration which is used for collecting the rations from food distribution centres. The 2,100 calories allocated per person per day is based on minimal standards and is frequently not achieved, as has been the case in Kenya. According to Article 20 of the Convention Relating to the Status of Refugees refugees shall be treated as national citizens in rationing schemes when there is a rationing system in place for the general population. Other types Health care rationing As the British Royal Commission on the National Health Service observed in 1979, "whatever the expenditure on health care, demand is likely to rise to meet and exceed it." Rationing health care to control costs is regarded as an explosive issue in the US, but in reality health care is rationed everywhere. In places where the government provides healthcare rationing is explicit. In other places people are denied treatment because of personal lack