Primary key

hello,

i have a question about the PRIMARY KEY,

how can we let it start from for example 1000 instead of 1?

This is our program:

CREATE TABLE hy3_pack

(

hy3_id serial NOT NULL,

hy3_serie_nummer text NOT NULL,

hy3_barcode text NOT NULL,

hy3_type_vulling text NOT NULL,

hy3_tarra_gewicht text,

hy3_artikel_id numeric NOT NULL,

hy3_refill boolean,

vernietigd boolean,

opmerking text,

CONSTRAINT hy3_pack_pkey PRIMARY KEY (hy3_id)

)

WITH (

OIDS=FALSE

);

ALTER TABLE hy3_pack OWNER TO postgres;

what must i change in my program?