North Macedonia has one of the highest shares of people struggling financially, with 72% of its citizens stating that they could manage on their household's income only "with difficulty" or "with great difficulty", though North Macedonia, along with Croatia, was the only country in the Western Balkans to not report an increase in this statistic. Corruption and a relatively ineffective legal system also act as significant restraints on successful economic development. North Macedonia still has one of the lowest per capita GDPs in Europe. Furthermore, the country's grey market is estimated at close to 20% of GDP. PPS GDP per capita stood at 36% of the EU average in 2017. With a GDP per capita of US$9,157 at purchasing power parity and a Human Development Index of 0.701, North Macedonia is less developed and has a considerably smaller economy than most of the former Yugoslav states.