Increase in the number of confirmed transactions over the last six months: About 50% (based on blockchain.info data from 329229 on June 15th to 490644 today).
Not very exact to just take one day, but it's a rough estimate at least. The multiple by which the Bitcoin price has increased over that time has been far higher than the increase in transaction volume, and the trading volume is only indicative of increased speculation, not necessarily increased usage.
It's great that BTC is performing well in some regards - I'd just like for people who decide to use BTC at this point (when the price appears to be unusually high) to be careful and avoid putting in money that they can't afford to lose. Because losing a large chunk of it is quite an imminent possibility.
The prospect of something being a bubble does not mean that it's worthless - actually, a bubble could have quite a high intrinsic value.