{
 "code": "LK.SOC.WDI.SE_PRM_PRS5_ZS.A",
 "name": "Persistence to grade 5, total (% of cohort) (World Bank WDI)",
 "unit": "% of cohort",
 "frequency": "Annual",
 "base_year": null,
 "producer": "World Bank",
 "publisher": "World Bank",
 "source_url": "https://data.worldbank.org/country/sri-lanka",
 "latest_vintage": "2026-10-08",
 "page": "/data/series/LK.SOC.WDI.SE_PRM_PRS5_ZS.A/",
 "notice": "Compiled by Macro Lab; not an official publication of the source agency. Provided as is, without warranty of any kind. Not investment advice.",
 "licence": "Source: The World Bank. Licence: CC BY 4.0. https://creativecommons.org/licenses/by/4.0/",
 "observations": [
  {"period": "1974", "value": 66.028923, "status": null},
  {"period": "1975", "value": 74.44, "status": null},
  {"period": "1976", "value": 78.55, "status": null},
  {"period": "1978", "value": 94.00, "status": null},
  {"period": "1981", "value": 89.85, "status": null},
  {"period": "1982", "value": 91.27, "status": null},
  {"period": "1983", "value": 90.96, "status": null},
  {"period": "1984", "value": 92.39, "status": null},
  {"period": "1985", "value": 92.74, "status": null},
  {"period": "1986", "value": 93.374588, "status": null},
  {"period": "1988", "value": 95.39, "status": null},
  {"period": "1989", "value": 90.76, "status": null},
  {"period": "1990", "value": 94.37, "status": null},
  {"period": "1991", "value": 92.20, "status": null},
  {"period": "2001", "value": 97.785141, "status": null},
  {"period": "2002", "value": 98.06, "status": null},
  {"period": "2005", "value": 98.74, "status": null},
  {"period": "2006", "value": 98.63, "status": null},
  {"period": "2010", "value": 97.330513, "status": null},
  {"period": "2011", "value": 96.574913, "status": null},
  {"period": "2012", "value": 98.47, "status": null},
  {"period": "2013", "value": 98.26, "status": null},
  {"period": "2014", "value": 99.18, "status": null},
  {"period": "2015", "value": 98.39, "status": null},
  {"period": "2016", "value": 98.47, "status": null},
  {"period": "2018", "value": 98.83, "status": null},
  {"period": "2019", "value": 98.71, "status": null},
  {"period": "2022", "value": 97.92, "status": null}
 ]
}