capita of Tanzania grew more than 40 percent between 1998 and 2007. In May 2009, the International Monetary Fund (IMF) approved an Exogenous Shock Facility for Tanzania to help the country cope with the global economic crisis Tanzania is also engaged in a Policy Support Instrument (PSI) with the IMF, which commenced in February 2007 after Tanzania completed its second three-year Poverty Reduction and Growth Facility (PRGF), the first having been completed in August 2003. The PRGF was the successor program to the Enhanced Structural Adjustment Facility, which Tanzania also participated in from 1996 to 1999. The IMF's PSI program provides policy support and signaling to participating low-income countries and is intended for countries that have usually achieved a reasonable growth performance, low underlying inflation, an adequate level of official international reserves, and have begun to establish external and net domestic debt sustainability. Tanzania also embarked on a major restructuring of state-owned enterprises. The program has so far divested 335 out of some 425 parastatal entities. Overall, real economic growth has averaged about 4 percent a year, much better than the previous 20 years, but not enough to improve the lives of average Tanzanians. Also, the economy remains overwhelmingly donor-dependent. Moreover, Tanzania has an external debt of $7.9 billion. The servicing of this debt absorbs about 40 percent of total government expenditures. Tanzania has qualified for debt relief under the enhanced Heavily Indebted Poor Countries (HIPC) initiative. Debts worth over $6 billion were canceled following implementation of the Paris Club 7 Agreement. Height measure studies for Tanzania show that welfare increased through the years of colonization, with a decline during the 1930s, due to epidemics in that period. Macro-economic trend This is a chart of trend of gross domestic product of Tanzania at market prices estimated by the International Monetary Fund with figures in millions of shillings. Mean wages were $0.52 per man-hour in 2009. The economy saw continuous real GDP growth of at least 5% since 2007. The following table shows the main economic indicators in 1980–2017. Inflation below 5% is in green. Agriculture The Tanzanian economy is heavily based on agriculture, which accounts for 28.7 percent of gross domestic product, provides 85 percent of exports, and accounts for half of the employed workforce; The agricultural sector grew 4.3 percent in 2012, less than half of the Millennium Development Goal target of 10.8 percent. 16.4 percent of the land