Mark the LOWEST percentage among the following:

Let's solve the options one by one, 

Option A: Export from Canada expressed as a proportion of export from North America in 2000 = (276635/1224975)*100 = 22.58%

Option B: Export from Germany expressed as a proportion of export from Europe in 2004 = (909887/4051000)*100=22.46%

Option C: Export from China expressed as a proportion of export from Asia in 2004 = (593326/2653100)*100 =22.36%

Option D: Export from Japan expressed as a proportion of export from Asia in 2003 = (471817/2138300)*100=22.06%

Among the above values ,
Export from Japan expressed as a proportion of export from Asia in 2003 is the lowest.
Hence D is the correct answer.