The following data represents the total expense spent by households in the US from the years 2000 to 2007
Overall you can see that the majority of the household expenditure is mainly spent on groceries followed by electricity and internet. There is also a gradual increase in the total amount spent per year for electricity and internet bills.
From 2002 to 2004 there is an incline in the total expenditure for groceries, reaching its peak in 2004 at roughly 90 billion dollars. This was met with a decline from 2005 till 2007, with the total expenditure being approximately 71 billion dollars
Electricity has shown a steady growth over the years, starting around 36 billion dollars in 2002 to roughly 60 billion dollars in 2007. Yearly expenses spent on internat bills also show similar trends to electricty, with a gradual growth from 2000 to 2004, but from 2004 to 2007 the total yearly amount spent on internet bills grew exponentially. The increase in money spent on electricity and internet bills overtime represents the growth in population thus more demand for electricity and an increase in accessibilty to the internet for each household