Here's a great image. This shows the "US Dollar Index" over time which is the dollar vs. a weighted average of 6 currencies.
What is easily noted is that the rate today is about the same as in 1999. This means the exchange rate is the worst most non-US webmasters have seen because they have been in the business less than 4 years. Those that have been around since, say 1996, can remember rates 15% lower than today (on average).
For most of the past decade the dollar was weaker
The dollar is hitting new lows vs. the euro but the euro is only four years old. If the Euro had been around for a few decades we'd be able to compare and say that we're 15% above the rates of 1992. We can estimate that because we can compare to the Deutschmark, Franc, and other european currencies of the time.
We just had a run-up in the dollar. So far it's gone back a little and is at 1999 rates again. Significant?