The Harmonized Index of Consumer Prices category "Solid Fuels (04.5.4)" is a classification of nondurable goods and energy that includes coal, coke, briquettes, firewood, charcoal, peat, and the like.
This category is a subcategory of the Housing, Water, Electricity, Gas, and Other Fuels (04) and of Electricity, Gas, and Other Fuels (04.5) categories.
Information provided in the notes pertaining to HICP classifications can be found from the source at: http://ec.europa.eu/eurostat/cache/metadata/en/prc_hicp_esms.htm.
Copyright, European Union, 1995-2016, http://ec.europa.eu/geninfo/legal_notices_en.htm#copyright.
Eurostat, Harmonized Index of Consumer Prices: Solid Fuels for Bulgaria [CP0454BGM086NEST], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CP0454BGM086NEST, February 17, 2018.