Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_203_54 ( id number, "selected\nlatin american\ncountries" text, "internl.\ntourism\narrivals\n2010\n(x 1000)" number, "internl.\ntourism\nreceipts.\n2010\n(usd\n(x1000)" number, "average\nreceipt\nper visitor\n2009\n(usd/turista)" number, "tourist\narrivals\nper\n1000 inhab\n(estimated)\n2007" number, "receipts\nper\ncapita\n2005\nusd" number, "revenues\nas %\nexports of\ngoods and\nservices\n2003" number, "tourism\nincome\n%\ngdp\n2003" number, "% direct and\nindirect\nemployment\nin tourism\n2005" number, "world\nranking\ntourism\ncompetitiv.\nttci\n2011" number, "2011\nttci\nindex" number )

### Question ###
tourism income in latin american countries in 2003 was at most what percentage of gdp ?

### Accurate SQL ###

SELECT "tourism\nincome\n%\ngdp\n2003" FROM table_203_54 ORDER BY "tourism\nincome\n%\ngdp\n2003" DESC LIMIT 1