But in any case, their issuance is roughly offsetting maturities so in net terms issuance isn't increasing. Similarly, mortgage originators have resumed issuance of RMBS over the past few months, following a pause in April. The AOFM has supported this by purchasing RMBS directly at issuance, and in the secondary market (with investors then recycling those funds into new primary issuance).
Before that, it is possible to get some guide to the split of borrowing between businesses and households by looking at which institutions were doing the lending. For example, credit extended by trading banks traditionally has mainly gone to businesses, while that extended by savings banks has mainly gone to households.