five consectutive years vs five consectutive year

Some examples from the web:

• Naita Fisheries went bankrupt five years ago after expanding.
• You could honeymoon for five or six years.
• I spent five years in that hellhole.
• Been about five years since my last visit.
• Isabella died five years ago yesterday.
• Please note that the duration must be limited to maximum five years.
• You know, Carlos went blind for five years.
• The five years necessary to transpose...
• I've been living with AIDS for five years.
• Base closed the tract five years ago.
• This strategy has to be reviewed every five years.
• My father disappeared for five years.
• Five years inside that hellhole prison on Mars.
• The mandatory minimum sentence for armed robbery is five years.
• Your office received that videotape five years ago.
• Five years probation for all your sins.
• Jesper Andersson stopped seeing Emil five years ago.
• My nurse left five years ago.
• Five years probation for all your sins.
• She had cervical cancer five years ago.

Some examples from the web:

• The expected five year survival is less than five percent.
• He has won Entertainer of the Year every year in Las Vegas for the last five years.
• Five hundred thousand ounces per year for five years. Payable to the company.
• The aid may be granted to the breeder in the appropriate calendar year, over five consecutive years.
• That year a girl with tanned skin won the championship on the local talent show for five consecutive rounds.
• 1. Short-term contracts shall cover at least five complete and consecutive months of the marketing year in question.
• The Parties shall review the origin quota level in Table A. at the end of every five year period for the first three consecutive five year periods following the entry into force of this Agreement.
• The cost of this programme over five years is only what we give as subsidies to tobacco growers in one year.
• 19,600 a year for five years, most likely seven.
• Five years ago, two candidates failed, this year one.
• The overall measures were valued at EUR 8 million per year for a duration of five years.
• It had a five year life span and is thus set to expire by the end of this year.
• Accordingly, the five-year forward break-even inflation rate five years ahead increased by 70 basis points, ending the year at 2.8%.
• Michael Scott came up with golden-ticket idea to give five customers 10% off for one year.
• Causes around five human fatalities a year... lives on the forest floor.
• Five men drowned in the Serpentine that year.
• Last year I had five cards.
• All the manuscripts from last year, five minutes ago.
• Some five million people die every year of Aids, malaria or tuberculosis.
• He had five months off last year.