I filled in prepositions,plz check!

Dear friends, could you please help me to put the right prepositions in the sentences below!
i've tried to do it myself, so please read what i've done in order to check if it's correct and makes any sence (prepositions in capitals) :-)
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"The chart shows the changes which took place IN student spending in the United Kingdom FOR the three-year period from 1996 to 1999.
Studens spent 3% less on accomodation, which fell FROM 23% TO 20% of total expenditure, and there was a 2% decrease IN spending on food, bills and household goods, which fell from 20% to 18%. At the same time course expenditure went down BY 3% from 10% to 7%. Children, who constituted 1% OF students' expenditure in 1996, are not represented in 1999.
On the other hand, there was a 5% growth IN spending on entertainment, which stood AT 26% of total expenditure in 1996 but rose TO 31% in 1999.
Spending on other non-essential items and credit repayments grew BY 4% to make UP 16% of total expenditure. Spending on essential travel went up TO 3% while non-essential travel underwent a 1% fall.
Overall, with the exception of expenditure ON travel, the most significant general change was a shift IN spending on essential items RATHER THAN spending on non-essential items."
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Thank you very very much in advance!!!