Someone once told me that the I 5 corridor in WA state had more glassblowers per capita then anywhere else in the world. Not so much any more, but the drop in glassblowers has been more than made up by lampworkers. Based on my own empirical data and scientific observation along with a statistically infallible consensus by other lampwokers there are around 350 million current or wana be lampworkers in the US. with a margin of error +or- 99.9%