A Diatom - Obs. by Year - Montana Field Guide

*Excludes Observations that spanned multiple years

Total	90
Pre 1970	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	6
2002	0
2003	4
2004	3
2005	3
2006	2
2007	6
2008	7
2009	0
2010	0
2011	4
2012	0
2013	0
2014	30
2015	0
2016	8
2017	14
2018	3
2019	0
2020	0
2021	0
2022	0
2023	0
2024	0
2025	0