Bulgaria's producer price index (PPI) rose 3.0% year-on-year in March, after increasing by 2.4% in February, the National Statistical Institute (NSI) said on Monday. On a monthly comparison basis, producer prices remained flat in March, after declining by 0.6% in the previous month, the NSI said in a monthly report on producer prices in industry. The PPI on the domestic market climbed 4.8% on the year and increased by 0.1% month-on-month in March. The PPI on the international market added 0.3% on the year and was 0.2% lower than the value recorded the month before.