In 1991, around 30% of the population was engaged in economic activity.[113] Rice production is an important activity in Kumbakonam.[113] Of 194 industrial units in Kumbakonam, 57 are rice and flour mills.[113] Kumbakonam is also a leading producer of betel leaves and nuts; the betel leaves produced in Kumbakonam are ranked amongst the best in the world in terms of quality.[113] The A. R. R. Agencies, a leading manufacturer of arecanut slices has its factory in Kumbakonam.[114] The main administrative offices of T. S. R. & Co., a cosmetic company, are also based in Kumbakonam.[115] Kumbakonam is also famous for its metal works.[113] The Tamil Nadu Handicraft Development Corporation had been established in the nearby town of Swamimalai in order to train bronze artisans.[113] Kumbakonam is an important silk-weaving centre and more than 5,000 families were employed either directly or indirectly in silk weaving.[113] Silk weaved in Kumbakonam is regarded as one of the finest in the subcontinent.[116] They are largely used in the manufacture of Thirubuvanam silk sarees.[113] Kumbakonam was also an important salt-manufacturing area during British rule.[117] The town lends its name to the Kumbakonam Degree Coffee, a blend of coffee prepared using undiluted pure milk.[118] In recent times, Kumbakonam has emerged as an important manufacturer of fertilizers.[8]