Nitrous oxide emissions in metric tons generated by chemical industry in Bulgaria

Period	Nitrous oxide emissions by chemical industry	Change
2022	251	6
2021	245	29
2020	274	15
2019	289	99
2018	388	74
2017	314	67
2016	381	40
2015	421	2
2014	419	5
2013	414	7
2012	421	335
2011	756	107
2010	863	16
2009	879	991
2008	1,870	80
2007	1,950	370
2006	1,580	1,370
2005	2,950	230
2004	2,720	460
2003	2,260	100
2002	2,160	470
2001	2,630	0
2000	2,630	900
1999	1,730	360
1998	2,090	1,400
1997	3,490	1,180
1996	4,670	130
1995	4,540	1,500
1994	3,040	220
1993	2,820	380
1992	3,200	600
1991	3,800	1,730
1990	5,530	240
1989	5,770	710
1988	6,480	280
1987	6,760	360
1986	7,120	330
1985	7,450	420
1984	7,030	890
1983	7,920	20
1982	7,900	330
1981	8,230	320
1980	8,550	100
1979	8,450	310
1978	8,760	760
1977	9,520	730
1976	8,790	880
1975	9,670	1,490
1974	8,180	340
1973	7,840	80
1972	7,920	190
1971	7,730	500
1970	7,230	1,220
1969	8,450	490
1968	7,960	530
1967	7,430	540
1966	6,890	540
1965	6,350	540
1964	5,810	520
1963	5,290	490
1962	4,800	460
1961	4,340	410
1960	3,930	380
1959	3,550	390
1958	3,160	390
1957	2,770	380
1956	2,390	360
1955	2,030	320
1954	1,710	290
1953	1,420	240
1952	1,180	180
1951	1,000	113
1950	887	71
1949	816	60
1948	756	51
1947	705	43
1946	662	38
1945	624	35
1944	589	33
1943	556	34
1942	522	37
1941	485	42
1940	443	48
1939	395	54
1938	341	59
1937	282	59
1936	223	57
1935	166	52
1934	114	46
1933	68	36
1932	32	23
1931	8	8
1930	0	0
1929	0	0
1928	0	0
1927	0	0
1926	0	0
1925	0	0
1924	0	0
1923	0	0
1922	0	0
1921	0	0
1920	0	0
1919	0	0
1918	0	0
1917	0	0
1916	0	0
1915	0	0
1914	0	0
1913	0	0
1912	0	0
1911	0	0
1910	0	0
1909	0	0
1908	0	0
1907	0	0
1906	0	0
1905	0	0
1904	0	0
1903	0