See if this works for you...
G6=COUNTIFS(C:C,">0",A:A,">="&DATE(F6,1,1),A:A,"<="&DATE(F6,12,31))
I6=COUNTIFS(C:C,">0",A:A,">="&DATEVALUE(1&H6),A:A,"<"&EDATE(DATEVALUE(1&H6),1))
for the week num, I used a helper that you can hide if needed...
D3=WEEKNUM(A3)&", "&YEAR(A3)
copied down

then I changed J6 etc to just 1, 2015
K6=COUNTIFS(C:C,">0",D:D,J6)