Table 9,,,,,,,,,,,,,,,,,,, Mexico-U.S./U.S.-Mexico Travel by Mode of Transportation,,,,,,,,,,,,,,,,,,, (Thousands of roundtrips),,,,,,,,,,,,,,,,,,, ,1990,,,,1996,,,,1999,,,,"Percentage change, ",,,,,, ,Number,,Percent,,Number,,Percent,,Number,,Percent,,1990-1999,,,,,, Mexican resident overnight travel to the United States ,"7,040",,100.0,,"8,709",,100.0,,"9,934",,100.0,,41.1,,,,,, Air ,959,,13.6,,983,,11.3,,"1,281",,12.9,,33.5,,,,,, Land ,"6,081",,86.4,,"7,726",,88.7,,"8,654",,87.1,,42.3,,,,,, ,,,,,,,,,,,,,,,,,,, Mexican resident same-day travel to the United States ,"91,494",,100.0,,"94,399",,100.0,,"107,031",,100.0,,17.0,,,,,, Air ,N,,N,,N,,N,,N,,N,,N,,,,,, Land ,"91,494",,100.0,,"94,399",,100.0,,"107,031",,100.0,,17.0,,,,,, ,,,,,,,,,,,,,,,,,,, U.S. resident overnight travel to Mexico ,"16,377",,100.0,,"20,302",,100.0,,"17,577",,100.0,,7.3,,,,,, Air ,"3,635",,22.2,,"5,361",,26.4,,"5,835",,33.2,,60.5,,,,,, Land ,"12,742",,77.8,,"14,941",,73.6,,"11,742",,66.8,,-7.8,,,,,, ,,,,,,,,,,,,,,,,,,, U.S. resident same-day travel to Mexico ,"64,038",,100.0,,"66,859",,100.0,,"77,778",,100.0,,21.5,,,,,, Air ,N,,N,,N,,N,,N,,N,,N,,,,,, Land ,"64,038",,100.0,,"66,859",,100.0,,"77,778",,100.0,,21.5,,,,,, KEY: N = data are nonexistent.,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,, NOTE: Detailed data for land modes are not available.,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,, "SOURCE: Banco de México, Dirección General de Investigación Económica, Dirección de Medición Económica, 1999 and 2001.",,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,