A report published by the National Institute for Early Education Research (NIEER) indicates that state funded pre-K funding rose by $36 per child in the 2012-2013 school year but that enrollment decreased by 9,200 students in the same time period.  The report, which tracks national trends in pre-K enrollment, quality, and spending, also indicates that number of states meeting NIEER quality benchmarks remained flat to 2012.  

Source: http://www.edweek.org/ew/articles/2014/05/13/32preschool.h33.html