Is this considered high oil consumption for a 4.4i?

[sshu]

I have been tracking oil consumption for the past 6 months and I noticed a considerable amount of oil lost over the past 2 months when the car was driven more on a daily basis. It's a 05 4.4i with 76.5k miles. The crankcase valve was changed back in 11/16/11. This is my unscientific recordings,

11/16/11 73.5k miles oil lvl was just above the 'MAX' mark on the dip stick
12/12/11 74.2k miles oil lvl at 'MA' mark on the dip stick
02/16/12 75.1k miles oil lvl at 2mm below 'MAX' mark
04/23/12 76.5k miles oil lvl at 2mm below 'MIN' mark

Between Feb an April the car was driven a lot around the city. I normally check the oil 5 minutes after shutting off warm engine. I added 2 quarts and it's 2mm below 'MAX' mark now. The oil consumption lvl seems higher than usual. Is this something to be alarmed by?