The U.S. Supreme Court is expected to release rulings on key cases over the next week, including the much-awaited decision on the Affordable Care Act.

The court has seen its workload decrease over the last 50 years. Last year, for example, the court issued just 71 rulings, the fewest since at least 1946, the earliest date in the Supreme Court Database. (It decided 197 cases in 1967). This chart shows the trend over time: