This page allows you to chart Lead Production by country. China far outstrips the US

http://www.indexmundi.com/minerals/?country=us&product=lead&graph=production

USA 2009 406000 Metric tons, lead content
CHINA 2009 1600000 Metric tons, lead content

http://www.indexmundi.com/minerals/?product=lead

We were the 3rd largest producer.

Winchester's patent for a lead free 22 rimfire
https://www.google.com/patents/WO1995008...ved=0CD4Q6AEwAQ

Winchester
http://www.basspro.com/Winchester-SuperX-22-Rimfire-Ammo/product/10219974/

Hornady NTX
http://www.hornady.com/store/22-WMR

CCI SRG
http://www.midwayusa.com/product/1301240...point-lead-free

A list of available non lead rimfire and center fire available
http://www.azgfd.gov/pdfs/w_c/condors/Non-LeadAmmo.pdf

So far, Eley (the standard for all rimfire accuracy) has made no announcement about producing non lead rimfire. The major 22 rimfire benchrest organizations have not updated their rules, some of which require a lead projectile.

Pete