Pick up to three yearly series from any page. On one chart each series is rescaled, so their shapes can be compared without a second axis. The numbers below say how closely they move together, and how much of that is only a shared trend.
Series A
Series B
Series C
Each series as an index: its 1968 value = 100. Hover or use arrow keys for the actual values.
A Murder rate in the United States, 2025 (FBI)
B Murder rate in the United States, 2025 (CDC)
A and B, 1968–2025: r = 0.99 on the yearly figures (58 years); r = 0.91 on the change from one year to the next (57 changes).