I was reading up about time zones on Wikipedia, when I came upon this chart showing the difference between UTC and the real time (mean solar time) over the last few years, and how leap seconds are introduced to keep UTC from diverging too far.

Apparently, there hase been a leap second about once a year until 1999, when the divergence rate slowed down and did not require adjustment until 2005. So I thought that they maybe tweaked the formula a little, but as it turns out for unknown reasons, Earth has sped up after year 2000, so the mean solar day has become 1 ms shorter and fewer leap seconds have been since then.

Should I be worried?