brood_year	value	component	origin	JPE_letter_date	footnote	references_contributors	lower_95_CI	upper_95_CI
1992	246157	Total natural production entering the Delta	Natural	1993-02-09	NA	NA	NA	NA
1993	66536	Total natural production entering the Delta	Natural	1993-10-01	NA	NA	NA	NA
1994	31491	Total natural production entering the Delta	Natural	1995-02-21	NA	NA	NA	NA
1995	338107	Total natural production entering the Delta	Natural	1995-10-20	NA	NA	NA	NA
1996	165069	Total natural production entering the Delta	Natural	1997-02-10	NA	NA	NA	NA
1997	138316	Total natural production entering the Delta	Natural	1998-04-27	NA	NA	NA	NA
1998	454792	Total natural production entering the Delta	Natural	1999-02-26	NA	NA	NA	NA
1999	289724	Total natural production entering the Delta	Natural	2000-01-01	NA	NA	NA	NA
2000	370221	Total natural production entering the Delta	Natural	2001-01-29	NA	NA	NA	NA
2001	1864802	Total natural production entering the Delta	Natural	2002-02-22	NA	NA	NA	NA
2002	2136747	Total natural production entering the Delta	Natural	2003-02-19	NA	NA	NA	NA
2003	1896649	Total natural production entering the Delta	Natural	2004-01-21	NA	NA	NA	NA
2004	881719	Total natural production entering the Delta	Natural	2005-02-08	NA	NA	NA	NA
2005	3831286	Total natural production entering the Delta	Natural	2006-02-10	NA	NA	NA	NA
2006	3739069	Total natural production entering the Delta	Natural	2007-02-15	NA	NA	NA	NA
2007	NA	Total natural production entering the Delta	Natural	NA	NA	NA	NA	NA
2008	617783	Total natural production entering the Delta	Natural	2009-01-12	NA	NA	NA	NA
2009	1179633	Total natural production entering the Delta	Natural	2010-02-24	NA	NA	NA	NA
2010	332012	Total natural production entering the Delta	Natural	2011-01-12	NA	NA	NA	NA
2011	162051	Total natural production entering the Delta	Natural	2012-01-26	NA	NA	NA	NA
2012	532809	Total natural production entering the Delta	Natural	2013-01-31	NA	NA	NA	NA
2013	1196387	Total natural production entering the Delta	Natural	2014-02-21	NA	NA	NA	NA
2014	124521	Total natural production entering the Delta	Natural	2015-01-16	NA	NA	NA	NA
2015	101716	Total natural production entering the Delta	Natural	2016-01-28	NA	NA	NA	NA
2016	166189	Total natural production entering the Delta	Natural	2017-02-03	NA	NA	NA	NA
2017	201409	Total natural production entering the Delta	Natural	2018-01-08	NA	NA	NA	NA
2018	433176	Total natural production entering the Delta	Natural	2019-02-01	NA	NA	NA	NA
2019	854941	Total natural production entering the Delta	Natural	2020-01-23	NA	Method 2 (O’Farrell et al 2018) with data from USFWS, UC Santa Cruz, and SWFSC	301002	1408880
2020	330130	Total natural production entering the Delta	Natural	2021-01-15	NA	Method 2 (O’Farrell et al 2018) with data from USFWS, UC Santa Cruz, and SWFSC	145088	515172
2021	125038	Total natural production entering the Delta	Natural	2022-01-14	NA	Method 2 (O’Farrell et al 2018) with data from USFWS, UC Santa Cruz, and SWFSC	59064	191013
2022	49924	Total natural production entering the Delta	Natural	2023-01-13	NA	Method 2 (O’Farrell et al 2018) with data from USFWS, UC Santa Cruz, and SWFSC	32298	67550
2023	234896	Total natural production entering the Delta	Natural	2024-01-12	NA	Method 2 (O'Farrell et al 2018) with data from USFWS, UC Santa Cruz, and SWFSC	159951	309841