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Table 1 Maize yields in Hg/Ha by agroecosystem 1 (1995–2011)

From: Farmer’s choice of seeds in four EU countries under different levels of GM crop adoption

Country or group Year: 1995 1996 1997 1998  1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 Avg. Ratio2
USA 71230 79776 79522  84382 83978  85910 86732  81179  89245 100636  92852 93576  94584  96596 103389  95923  92366  88934 1
Austria 85010 86200 97800  96140 95919  98569 90869  96767  98541 108834 106570 92373  99277 110633 105910 120645 183919 104352 0.85
France 77172 83817 90592  84525 89482  90768 85637  89787  71165  89906  82539 87202  96727  92994  91008  88956 101901  87893 1.01
Germany 73664 78254 86266  81561 87850  92119 88377  93755  73845  91250  92139 80307  94475  98099  97500  87854 106230  88444 1.01
Netherlands 70444 80000 50394 110000 70188 110000 88971 133029 116667 118163 122003 91529 119482 114163 130266 117673 123356 103902 0.86
Spain 72458 85308 91500  94731 94807  92157 97207  95141  90408 100690  96099 97436 100026  99060 101220  99245 104692  94834 0.94
Switzerland 86208 88366 95583  92511 91606  99545 92194  94996  42989  96136  96497 84488 101694  97026 104131  94360  96999  91490 0.97
Proportion GM (%)                    
USA*    8 25 40 25 26 34 39 44 51 60 73 80 85 86 88   
Spain3     4        11 17 21 30 21 25 27   
  1. 1 Hectograms/hectare. Range of GM area is from 4% to 85% and proportions taken from GMO Compass or USDA*, or from acreage reported on GMO Compass and total acreage for corresponding year from FAOSTAT (http://faostat3.fao.org/home/index.html#DOWNLOAD).
  2. *http://www.ers.usda.gov/data-products/adoption-of-genetically-engineered-crops-in-the-us.aspx.
  3. 2 Ratio is (average yield in USA)/(average yield of country in corresponding row).
  4. 3 Proportions of GM cultivation in maize only reported in 1998, 2005–2011. Intervening years had GM cultivation.