Americans spend quite a bit of money to show their love on Valentine's Day (I don't know if Nigerian and Nairalanders as well spend up to these figures).
Here's a Breakdown, by the numbers:

$130.97 -- The per person average estimated amount that people will spend on Valentine's Day.
224 million -- The estimated number of roses grown for Valentine's Day.
51% -- The percentage of people who buy red roses for this holiday.
64% -- The percentage of men who buy flowers for Valentine's Day.
36% -- The percentage of women who buy flowers for Valentine's Day.
$18.6 billion -- The total spending that will be reached by Valentine's Day.
$1.6 billion -- The amount people will spend on candy.
$1.9 billion-- The amount people will spend on flowers.
$4.4 billion -- The amount people will spend on diamonds, gold and silver.

March 14 -- The day men give women romantic gifts in South Korea and Japan; women give men chocolate on Valentine's Day.
$4.52 -- The average amount pet owners spent on their pets on Valentine's Day in 2012.
40.7% -- The percentage of people who will use their
Smartphone to purchase Valentine's gifts.
85% -- The percentage of men and women who say sex is an important part of Valentine's Day.
6 million -- The number of people who expect or are planning a marriage proposal.
29% -- The percentage of people who will type a romantic text message.
145 million -- The unit amount of Valentine's cards purchased.
151 million -- The approximate number of cards that are exchanged on Valentine's Day.
1,400 -- Varieties of Hallmark's available Valentine's greeting cards.

http://www.cnn.com/2013/02/13/living/valentines-day-statistics-btn/index.html?c=&page=0
We are yet to get the actual number of condoms being used on that Day and the number to patronage to hotels.
Also the number of baby being delivered after 9 month or thereabout from the Valentine Day Date.
Once we get those figures, I shall publish them,thanks.