{"entity":{"iso2":"BG","iso3":"BGR","name":"Bulgaria","slug":"bulgaria"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"births-per-month-annual","source":"Human Mortality Database (2025) \u2013 processed by Our World in Data","source_url":"https://ourworldindata.org/grapher/births-per-month-annual","title":"Birth seasonality","unit":"births per million people"},"observations":[{"date":"1900-01-01","value":35.5009},{"date":"1905-01-01","value":52.37},{"date":"1910-01-01","value":46.0308},{"date":"1920-01-01","value":57.5431},{"date":"1925-01-01","value":51.3234},{"date":"1930-01-01","value":48.8676},{"date":"1935-01-01","value":40.1783},{"date":"1939-01-01","value":37.0753},{"date":"1940-01-01","value":38.792},{"date":"1941-01-01","value":37.4196},{"date":"1942-01-01","value":41.5232},{"date":"1943-01-01","value":45.0853},{"date":"1944-01-01","value":49.9142},{"date":"1945-01-01","value":56.3726},{"date":"1946-01-01","value":48.8906},{"date":"1947-01-01","value":52.1493},{"date":"1948-01-01","value":52.9874},{"date":"1949-01-01","value":53.455},{"date":"1950-01-01","value":53.5141},{"date":"1951-01-01","value":44.6072},{"date":"1952-01-01","value":42.6224},{"date":"1953-01-01","value":40.502},{"date":"1954-01-01","value":40.6364},{"date":"1955-01-01","value":40.4293},{"date":"1956-01-01","value":37.7604},{"date":"1957-01-01","value":40.8841},{"date":"1958-01-01","value":41.1426},{"date":"1959-01-01","value":38.3996},{"date":"1960-01-01","value":41.4241},{"date":"1961-01-01","value":40.6086},{"date":"1962-01-01","value":38.1458},{"date":"1963-01-01","value":36.1847},{"date":"1964-01-01","value":37.8588},{"date":"1965-01-01","value":36.4354},{"date":"1966-01-01","value":37.7452},{"date":"1967-01-01","value":39.9663},{"date":"1968-01-01","value":45.8032},{"date":"1969-01-01","value":39.5837},{"date":"1970-01-01","value":40.8077},{"date":"1971-01-01","value":37.7518},{"date":"1972-01-01","value":39.6762},{"date":"1973-01-01","value":47.7825},{"date":"1974-01-01","value":41.1054},{"date":"1975-01-01","value":42.781},{"date":"1976-01-01","value":40.7332},{"date":"1977-01-01","value":39.8594},{"date":"1978-01-01","value":39.0151},{"date":"1979-01-01","value":38.9013},{"date":"1980-01-01","value":38.0393},{"date":"1981-01-01","value":34.6129},{"date":"1982-01-01","value":35.1033},{"date":"1983-01-01","value":35.965},{"date":"1984-01-01","value":33.5429},{"date":"1985-01-01","value":36.184},{"date":"1986-01-01","value":33.53},{"date":"1987-01-01","value":34.2808},{"date":"1988-01-01","value":33.5927},{"date":"1989-01-01","value":32.2875},{"date":"1990-01-01","value":30.8452},{"date":"1991-01-01","value":26.257},{"date":"1992-01-01","value":26.0887},{"date":"1993-01-01","value":23.7999},{"date":"1994-01-01","value":23.2328},{"date":"1995-01-01","value":21.3063},{"date":"1996-01-01","value":22.4786},{"date":"1997-01-01","value":17.474},{"date":"1998-01-01","value":21.4682},{"date":"1999-01-01","value":22.3767},{"date":"2000-01-01","value":24.6302},{"date":"2001-01-01","value":21.2232},{"date":"2002-01-01","value":22.5736},{"date":"2003-01-01","value":21.6816},{"date":"2004-01-01","value":23.6549},{"date":"2005-01-01","value":24.4098},{"date":"2006-01-01","value":24.8698},{"date":"2007-01-01","value":27.3072},{"date":"2008-01-01","value":27.4413},{"date":"2009-01-01","value":28.1024},{"date":"2010-01-01","value":27.1791},{"date":"2011-01-01","value":24.6895},{"date":"2012-01-01","value":24.5714},{"date":"2013-01-01","value":23.683},{"date":"2014-01-01","value":23.5248},{"date":"2015-01-01","value":22.574},{"date":"2016-01-01","value":23.0422},{"date":"2017-01-01","value":22.3107},{"date":"2018-01-01","value":21.7243},{"date":"2019-01-01","value":21.8021},{"date":"2020-01-01","value":19.8366},{"date":"2021-01-01","value":21.8465}],"summary":{"latest_period":"2021-01-01","latest_value":21.8465,"max":57.5431,"mean":35.2588,"min":17.474,"of":40,"rank":26,"trend":"falling"}}