Dear Experts

Some company wants to maintain Employees' Service duration in 5 years groups as

CREATE cursor Years (cname c(15),arrival D(8), Depart d(8))
INSERT INTO Years VALUES ('A',{^1945-07-01},{^1965-07-01}) 	&& 20 year
INSERT INTO Years VALUES ('B',{^1975-07-01},{^1977-07-01})	&& 2 year
INSERT INTO Years VALUES ('C',{^1975-07-01},{^1977-07-01})	&& 2 year
INSERT INTO Years VALUES ('D',{^1970-07-01},{^1991-07-01})	&& 21 year
INSERT INTO Years VALUES ('E',{^1981-07-01},{^1986-07-01})	&& 5 year
INSERT INTO Years VALUES ('F',{^1981-07-01},{^1986-07-01})	&& 5 year
INSERT INTO Years VALUES ('G',{^1987-07-01},{^1997-07-01})	&& 10 year
INSERT INTO Years VALUES ('H',{^1998-07-01},{^2009-07-01})	&& 11 year
INSERT INTO Years VALUES ('H',{^1940-07-01},{^1975-07-01})	&& 35 year

I want to get following results

var1=4  && duration is between 1 to 5 year
var2=1	&& duration is between 6 to 10 year
var3=1	&& duration is between 11 to 15 years
var4=1	&& duration is between 16 to 20 years
var5=1	&& duration is between 21 to 25 years
var6=0	&& duration is between 26 to 30 years
var7=1	&& duration is between 31 to 35 years

and so on. Every group consists on 5 years

Please help