Read the source given below and answer the questions that follow:

The European companies gradually gained power first securing a variety of concessions from local courts, then the monopoly rights to trade. This resulted in a decline of the old ports of Surat and Hooghly through which local merchants had operated. Exports from these ports fell dramatically, the credit that had financed the earlier trade began drying up, and the local bankers slowly went bankrupt. In the last years of the seventeenth century, the gross value of trade that passed through Surat had been ₹ 16 million. By the 1740s it had slumped to ₹ 3 million.

The gross value of trade that passed through Surat had been ____million