What if the Romans hadn't come to Britain?

The Romans used only 7 letters to represent all numbers . . .

I V X L C D M

I = 1

V = 5

X = 10

L = 50

C = 100

D = 500

M = 1000

Letters are placed before or after each other to lower or increase their value.

VI = 6

IX = 9

MXIV = 1014

MCMLXXXVIII = 1988

IIMM = 1998

MMI = 2001

Can you work out how to write your age in Roman numbers?
What about the year that you were born in?