In order to visualise the sunrise and sunset times over the course of a year, I used data from the USNO Sun or Moon Rise/Set Table for One Year service and the Google Chart API to create a sunrise/sunset graph with a correction for daylight saving time (click for a larger version):
This visualisation neatly shows that daylight saving time tries to keep sunrise within about a two hour window (6am to 8am) while sunset is allowed to vary over four hours (5pm to 9pm) during the course of a year.