जनगणना 2011 के अनुसार, राजस्थान के कितने जिलों में उनकी कुल जनसंख्या में अनुसूचित जनजाति की जनसंख्या 50% से अधिक थी?

Among the following census years, in which year was the urban population proportion of Rajasthan the lowest?

Which district of Rajasthan has the highest percentage of Scheduled Tribe (ST) population relative to its total population according to Census 2011?