York has an impressive reputation for research with 19 Units of Assessment out of the 23 in the 2000 Research Assessment Exercise receiving a rating of 5 and three 5* (where 1 is the lowest and 5* is the highest possible) ratings in the 2001 Research Assessment Exercise. The Department of English and Related Literature and the Department of Computer Science were later upgraded from 5* to 6* (indicating successive 5* grades), and the Department of Psychology has been rated 6* for funding. Using these statistics, York was ranked the sixth-best research institution in the United Kingdom. The proportion of staff submitted as research active in each Unit of Assessment was above 80%.