PGA Tour Driving Distance
Better equipment and improved fitness have allowed players on the PGA Tour to extend their driving distance substantially in the last three decades, roughly a yard on average each season. This chart shows the trend since 1980:
Driving Distance - Yards
The trend is more obvious with some players than others. Take Kenny Perry, who experienced 40-yard driving distance fluctuations during his career.
Driving Distance - Kenny Perry (Min: 265 | Max: 305)
Even players I've always considered long off the tee have seen dramatic increases in their distance over time. Here's Phil Mickelson, who in 2003 had increased his average drive by 37 yards over his rookie season a decade before.
Driving Distance - Phil Mickelson (Min: 269 | Max: 306)
Data source: PGA Tour | Built with Highcharts