The given table illustrates structure of household in a North American country between 1970 and 2003.
Overall, despite a sharp decline in the proportion, married couple was still the most common of family structures in throughout, whereas the opposite trend can be seen in the other ones. In addition, non-family household witnessed a significant rise in popularity.
Looking first at the structure of family household, married couple accounted for a remarkable high at around 61% before decreasing 20% in the end of the examined time. Noticeably, only increasing 1% about the popularity can be seen in the figure for the remaining household composition in this type. Particularly, single-parent family showed a rise from 9% to 10% initially, followed by an increase to 11% in the next 33 years. Other member sharing saw similar trend from 13% to 14% in 2003.
Regarding non-family structure, both single and room sharing were the least popular family composition in the beginning year, at 4% and 3%, respectively. With the significant shift from married couple to these kinds, as they had risen dramatically to 13% and 11% by 2003. Notably, single-person families surpassed single-parent ones to become the third common family structure in the end of the period.