It can be clearly seen that the parenting books was the most popular category during in 2001 ; while interestingly, the biggest proportion of consumer group was men between 25 and 50 years old.
Gardening books and Fantasy books with 13% and 11% of total sales, compared with, were about half of the sales of Parenting and cooking books separately.
This does not compute. Simplify by comparing gardening and fantasy books to parenting books (each had only half of parenting sales.) Maybe worthwhile deducing that this indicates parenting is the most consumer relevant subject.
In terms of consumers (remove the comma) between the ages group of 25 and 50, men with 28% of total sales and women with 23% of total sales dominated the consumer market.
Shouldn't if be just one group that dominated the market? How can both parts of the total universe (M/F) dominate the market?
In terms of age group under 25 and over 50, women consumers occupied equal shares of 14%; correspondingly, the men of same age groups were 2% lower and 5% lower than women respectively/separately.
What do you mean by equal shares of 14% = equal to men??
Not sure what you are comparing herel: the men of same age groups were 2% lower and 5% lower than women respectively/separately : LOWER THAN WHAT SEGMENT OF women? Cannot make a meaningful observation based on these stats.
"In conclusion" or "To sum up" are both fine.