By the year; every year (usually with reference to a sum of money paid or received)(adverb)
WordNet. Princeton University. 2010.
Use "each year" in a sentence
"Thus the Daughters of St. Vincent de Paul make only annual vows, and as each year is completed they are free to return to the world."
"Millions of pilgrims who flock to the city several times each year are often targeted by insurgents looking to stoke sectarian violence."
"It is a law of the society to make its affairs public, and each year an integral account of all money received, all appropriations made, and all expenditures is published in the "Annals"."