Ellis Island : Immigration et American Dream

Read the following short excerpt regarding the Ellis Island historical records and answer the questions. 'Between $1892$ and $1954$, over $12$ million immigrants entered the United States through Ellis Island. Many arrived with less than $50$ dollars in their pockets, seeking a better life. Today, it is estimated that nearly $40\%$ of all U.S. citizens can trace at least one ancestor back to this specific entry point.' Questions: 1) Calculate the average number of immigrants per year if the period lasted exactly $62$ years. 2) Based on the text, what is the main motivation for these immigrants, and how does it relate to the concept of the 'American Dream'?