Month	Inflow to HAD (MCM)			HAD Energy(GWh)			HAD Reservoir pool level (m.a.s.l)
Month	Before GERD	After GERD	Difference (%)	Before GERD	After GERD	Difference (%)	Before GERD	After GERD	Difference %
Jan	1779	4401	147	349	316	−10	166	161	−3
Feb	1410	3927	178	409	377	−8	165	161	−2
Mar	1290	3999	210	552	522	−5	164	161	−2
Apr	1367	3761	175	525	502	−4	163	161	−2
May	1672	3890	133	670	645	−4	162	160	−1
Jun	2512	3597	43	808	784	−3	161	159	−1
Jul	9135	5382	−41	834	806	−3	159	158	−1
Aug	19084	8410	−56	738	688	−7	159	157	−1
Sep	14908	10569	−29	553	487	−12	163	157	−4
Oct	8539	8248	−3	484	422	−13	165	159	−4
Nov	3960	5512	39	441	388	−12	166	160	−4
Dec	2428	4909	102	432	386	−11	166	161	−3
Yearly	68084	66605	−2	6797	6323	−7	163	160	−2.3