After more digging I was able to find some figures relating to the
expenditure of plumbing fixtures, as well as for time spent in the
shower by Americans.
1. Expenditures for plumbing fixtures can be found in the Appendix of
a study conducted by The Joint Center for Housing Studies. The Joint
Center for Housing Studies is Harvard University's center for
information and research on housing in the United States.
R05-1: The Changing Structure of the Home Remodeling Industry - Appendix
R05-1: The Changing Structure of the Home Remodeling Industry
2. Time Americans spend in the shower:
NCBuy news article: 'Average American Showers For 8 Minutes' [2001-07-19]
"The average length of time spent in the shower is five to 10 minutes
for 60% of those studied."
From: 'American Standard studies bathroom usage' [July 14, 1999]
"Most Americans shower everyday, for 10 minutes or less, and spend 35
minutes of time in the bathroom, on average. These are some of the
not-so-surprising findings on people's ablutions derived from the 1999
Bathroom Habits Survey, American Standards poll of more than 800 U.S.
From: 'Americans pick showers over tubs' | Home Channel News [July 19, 1999]
"Our studies show that both men and women are spending more time in a custom
shower. But there are differences: men shower to get clean in just 3-5 minutes;
women take 5-7 minutes."
[*I was unable to find more specific figures]
"minutes in the shower"
"american showers for"
"american spends * in the shower"
"in the shower" spend men women
"in the shower" spend men women minutes -jokes
"spent in the shower" study
I hope this information is useful.
Google Answers Researcher