BEIJING -- China's courier sector registered robust growth in June, according to an industry index.

The China express delivery development index came in at 364.2 in June, surging 75.1 percent from the same period last year, the State Post Bureau said in a report.

The sub-index for growth scale rose 37.1 percent year-on-year to 297.2, as the sector expects its business revenue to near 80 billion yuan (about $11.4 billion), up over 24 percent from a year ago.

Meanwhile, the business volume of the courier sector is expected to top 7.6 billion parcels, up 40 percent year-on-year, the report shows.

The sub-index for service quality jumped 124.3 percent year-on-year to 667.2, as the overall performance continued to improve despite COVID-19 disruptions.

The express delivery development trend sub-index saw 42.2 percent year-on-year growth to 100, according to the report.

With the spread of COVID-19 further contained in China, the capital market bolsters confidence in the growth of the country's courier sector, the report added.

Compiled on the basis of data from China's major logistics firms operating delivery services, the index reflects the overall business activities and trends in the country's courier sector.