Kolkata, April 9 -- West Bengal chief minister Mamata Banerjee's declared income has increased by nearly 50% over the last five years, according to her election affidavit filed on Wednesday along with her nomination to the Bhabanipur assembly constituency in south Kolkata. The Trinamool Congress (TMC) chief declared an annual income of Rs.23,21,570 for 2024-25, up from Rs.15,47,845 in 2020-21. Her income, she has consistently maintained, comes from bank interest and royalties from her books. "She is a seven-term MP and a three-term chief minister but she never drew any salary. Her only sources of income are bank interests and royalty from books," a TMC leader said, requesting anonymity. Banerjee, known for her literary pursuits, has authore...