The phrase "by year" refers to something that is done or calculated with respect to each individual year. Synonyms for "by year" include annually, per annum, yearly, each year, every year, and on an annual basis. These phrases are commonly used in both personal and professional contexts, particularly in industries such as finance and accounting. For example, a financial report may show revenue figures for each year, or an employment contract may outline a salary increase that will occur annually. However, while these phrases can be used interchangeably, it's important to consider the appropriate context when choosing which synonym to use.