Duration of pre-primary is the number of grades (years) in pre-primary education.
| तिथि | मान | बदले , % |
|---|---|---|
| 2019 | 5.0 | 0.00% |
| 2018 | 5.0 | 150.00% |
| 2016 | 2.0 | 100.00% |
| 2015 | 1.0 | 0.00% |
| 2014 | 1.0 | 0.00% |
| 2013 | 1.0 | 0.00% |
| 2012 | 1.0 | 0.00% |
| 2011 | 1.0 | 0.00% |
| 2010 | 1.0 | 0.00% |
| 2009 | 1.0 | 0.00% |
| 2008 | 1.0 | 0.00% |
| 2007 | 1.0 |