If you do some research on the Net, the human heart beats between 60-90 (or 60-100, depending on which site you visit!) beats per minute. So your pulse rate seems to be "within the range". I've explored this question with my cardiologist and doctors a couple of times, and they seem to be of the opinion that only if the "faster" pulse gives rise to any untoward symptoms such as palpitations, pain, etc should it be a cause for concern. Some people just have a higher resting heart rate for various reasons - hence the wide range quoted above. People who are fit will have lower pulse rates, somewhere in the region of the low 40s! Generally, the older you are, the slower your heart will beat, and the more out-of-shape you are, the faster your heart will beat.
A couple of major contributing factors to a faster pulse are anxiety, stress, and anger. If you take your pulse often, it's likely that the fact that you have discovered that your pulse is higher than the average (whatever average is defined as!) will cause your pulse to go even higher!
As Rick mentioned, it's best to check firstly with your doctor who may be able to do an ECG. If anything untoward is discovered, he/she may then refer you to a cardiologist for further investigation. But I suspect that it's only anxiety that's causing your slightly faster pulse! Once you've been assured that nothing is wrong, stop taking your pulse! For people who are easily panicked/stressed/anxious, it will only make the pulse go faster, and I'm speaking from personal experience!