Crisil said the assessment is based on its study of the top 18 states (Maharashtra, Gujarat, Karnataka, Tamil Nadu, Uttar Pradesh, Andhra, Telangana, Rajasthan, Bengal, Madhya Pradesh, Kerala, Haryana, Bihar, Punjab, Odisha, Chhattisgarh, Jharkhand and Goa), which account for 90% of the aggregate GSDP