Subject: How much mass is the earth gaining/losing each year?

As I see it, there are several processes at work in the alteration of the mass 
of the Earth.  Can you help me figure out how much mass the Earth gains/loses 
each year?  Here is the equation I have come up with so far:
 
Total mass change = [Amount of space debris (dust, meteorites, etc) that falls 
to the earth] + [amount of space junk (from NASA, etc) that falls back to 
Earth] + [the mass of the solar wind absorbed by Earth] + [the mass-energy 
absorbed by the Earth due to the photoelectric effect] + [The mass of 
neutrinos??? absorbed by Earth] - [The total mass-energy of light emitted into 
space by manmade lights and radio, natural fires, volcanoes, lightning, etc] - 
[the mass of space shuttles and cargo blasted off into space] - [the mass-
energy of the thermal heat lost to space] - [any gasses that escape into space]

Please help me complete this formula and perhaps even plug in some numbers.  
Alternatively, I imagine you could get the end answer by studying the Earth's 
movement around the sun (velocity, distance, etc.)

Thanks,
scott

Re: How much mass is the earth gaining/losing each year?