{"entity":{"iso2":"PL","iso3":"POL","name":"Poland","slug":"poland"},"indicator":{"licence":"Derived by Statizoid from the sources named on the page","slug":"25-sdr-holdings-per-square-kilometre","source":"Statizoid (derived)","source_url":null,"title":"25_SDR holdings, per square kilometre","unit":"units per square kilometre"},"observations":[{"date":"1990-01-01","value":2.166},{"date":"1991-01-01","value":8.70319},{"date":"1992-01-01","value":28.9316},{"date":"1993-01-01","value":0.958314},{"date":"1994-01-01","value":35.835},{"date":"1995-01-01","value":4.19103},{"date":"1996-01-01","value":11.5127},{"date":"1997-01-01","value":14.9232},{"date":"1998-01-01","value":18.5511},{"date":"1999-01-01","value":23.2845},{"date":"2000-01-01","value":41.3001},{"date":"2001-01-01","value":62.51},{"date":"2002-01-01","value":90.3092},{"date":"2003-01-01","value":139.759},{"date":"2004-01-01","value":187.837},{"date":"2005-01-01","value":234.617},{"date":"2006-01-01","value":264.253},{"date":"2007-01-01","value":298.189},{"date":"2008-01-01","value":366.849},{"date":"2009-01-01","value":346.484},{"date":"2010-01-01","value":6639.45},{"date":"2011-01-01","value":6056.98},{"date":"2012-01-01","value":5623.83},{"date":"2013-01-01","value":5142.65},{"date":"2014-01-01","value":4982.07},{"date":"2015-01-01","value":4265.0},{"date":"2016-01-01","value":1440.64},{"date":"2017-01-01","value":1329.84},{"date":"2018-01-01","value":1418.94},{"date":"2019-01-01","value":1342.35},{"date":"2020-01-01","value":1307.9},{"date":"2021-01-01","value":1356.36},{"date":"2022-01-01","value":19088.7},{"date":"2023-01-01","value":18608.6}],"summary":{"latest_period":"2023-01-01","latest_value":18608.6,"max":19088.7,"mean":2376.01,"min":0.958314,"of":188,"rank":49,"trend":"volatile"}}