were often dealt with in the same manner (individuals were prosecuted or persecuted separately), but occasionally also met stubborn refusal to deal or in some cases brutal force. Strikes occurred in all times of political upheaval or economic hardships, but they became increasingly common in the 1980s, when consecutive governments tried to salvage the slumping economy with a programme of austerity under the auspices of the International Monetary Fund. From 1970 onwards, despite 29% of its population working in agriculture, Yugoslavia was a net importer of farm products. During the 1960s and 1970s the country's social security expenditures increased 600%, as coverage of the population was extended and benefits were enlarged. The government introduced extensive subsidies for public health care, temporary disability and illness, old age pensions and assistance to mothers. There were, in particular, a great number of social security benefits intended to take the pressure of child raising off women, making it easier for them to focus on studying and gaining employment. Women received 90 days of paid maternity leave after having a baby, a range of other subsidies to help pay for food, clothing and other necessities. There were also subsidised public childcare services that low-income families could use for free. Effect of the oil crisis The oil crisis of the 1970s magnified the economic problems, the foreign debt grew at an annual rate of 20%, and by the early 1980s it reached more than US$20 billion. Governments of Milka Planinc and Branko Mikulić renegotiated the foreign debt at the price of introducing the policy of stabilisation which in practice consisted of severe austerity measures — the so-called shock treatment. During the 1980s, Yugoslav population endured the introduction of fuel limitations (40 litres per car per month), limitation of car usage to every other day, based on the last digit on the licence plate, severe limitations on import of goods and paying of a deposit upon leaving the country (mostly to go shopping), to be returned in a year (with rising inflation, this effectively amounted to a fee on travel). There were shortages of coffee, chocolate and washing powder. During several dry summers, the government, unable to borrow to import electricity, was forced to introduce power cuts. On May 12, 1982, the board of the International Monetary Fund approved enhanced surveillance of Yugoslavia, to include Paris Club creditors. Collapse of the Yugoslav economy In the 1980s the