0-$1000: 100,000%
$1000-2000: 100%
$2000-3000: 50%
$3000-4000: 33%
$4000-5000: 25% (and has not yet happened by the way).

now that you look at it like this, you can see it was not really a significant rise, you should change your price ranges into percentages if you want to compare them in my opinion. (it will still be similar -faster rise as time passes- but it won't be that big)

the adoption is like this and we are still in the "early adopters" stage which is pretty slow. and it will get faster soon and becomes vertical (with it price will be the same) until the mass adoption and then it plateaus.