Year	Observed	Case 1		Case 2		Case 3		Case 4		Case 5
Year	Total (tons)	Total (kg)	R²	Total (kg)	R²	Total (kg)	R²	Total (kg)	R²	Total (kg)	R²
2003	836.9	78.5	0.45	80.2	0.46	200.9	0.77	91.4	0.46	288.1	0.77
2004	2460.2	482.7	0.80	490.3	0.80	1224.3	0.67	539.1	0.84	1673.0	0.70
2005	1564.3	303.0	0.20	309.3	0.21	1083.0	0.60	417.4	0.18	1552.6	0.66
2006	954.2	133.6	0.27	139.1	0.29	568.5	0.77	206.8	0.44	847.5	0.82
2007	1848.3	384.2	0.19	390.6	0.22	1122.0	0.77	450.6	0.18	1565.4	0.78
2008	742.9	133.4	0.19	139.4	0.20	490.7	0.61	180.3	0.25	751.2	0.62
2009	2189.8	292.1	0.51	297.8	0.56	981.2	0.62	329.6	0.65	1335.8	0.65
2010	1092.9	1001.1	0.03	1007.0	0.01	1120.8	0.29	1087.5	0.02	1540.1	0.50
Mean	1461.2	351.1	0.33	356.7	0.34	848.9	0.64	412.8	0.38	1194.2	0.69