The biggest of the leftover exchange misshaping approaches are those disturbing horticulture. In the OECD nations government installments represent 30% of ranchers' receipts and levies of north of 100% are common. [33] OECD financial analysts gauge that cutting every single horticultural duty and endowments by half would set off a chain response in realignments of creation and utilization designs that would add an additional a $26 billion to yearly world income.[34][full reference needed]