Mexico's economy is much larger than 200 billion a year. You are talking foreign earnings perhaps. The GDP of Mexico is what you need to consider. Mexico has the 14th largest economy in the world with a per capita of approx 12,500usd measured in PPP: There are 110 million Mexicans. You do the math.
But...latest stats indicate that about 40% of those 110 million Mexicans live on far, far less than your per capita figure. Many live on less than minimum wage, and the maximum
2010 minimum wage in Mexico (Zone A, in and around the DF) is set at 57.46 pesos per day. The minimum
minimum wage (Zone C, in predominately rural states) is set at 54.47 pesos per day. As you mentioned, you do the math...