A health savings account supplier says the percentage of accounts with more than $2,000 in assets increased to 31% at the end of 2009, from 20% a year earlier.

JPMorgan Chase & Company, New York (NYSE: JPM), administers HSAs for 530,000 high-deductible health insurance coverage holders with about $800 million in HSA assets.

The percentage of J.P. Morgan HSAs with more than $1,000 in assets increased to 45% at the end of 2009, from 35% a year earlier.

The percentage with balances under $500 fell to 42%, from 50%, and the average 2009 account contribution was $1,816. The accounts averaged $1,305 in annual spending.