Year by year
Definition 1 of 1
Pro Tip 1/3Consistent Change
Refers to gradual changes that happen steadily over each year. 
His language skills improved year by year.
Pro Tip 2/3Comparison Tool
Useful for comparing situations or things at different annual points. 
Year by year, the festival became more popular.
Pro Tip 3/3Indicates Trends
Helps to describe trends over time, especially in business or studies. 
The demand for renewable energy grows year by year.