Between 1929 and 1933, the public succeeded in increasing its cash holdings by 31 per cent; commercial bank reserves were scarcely altered (indeed, surviving banks built up excess reserves); but commercial bank deposits decreased by 37 per cent and loans by 47 per cent. The absolute numbers reveal the lethal dynamic of the 'great contraction'. An increase of cash in public hands of $1.2 billion was achieved at the cost of a decline in bank deposits of $15.6 billion and a decline in bank loans of $19.6 billion, equivalent to 19 per cent of 1929 GDP.91