Major parties in Uttar Pradesh 1951-2012

Here we see how major parties in Uttar Pradesh have done in state legislative elections over the years. If you click on the icons for the BSP (Bahujan Samaj Party) and SP (Samajwadi Party), you see how their share of seats has grown since the 1990s. And that growth has clearly come at the expense of the INC (Indian National Congress).