SQL & PL/SQL :: Copy Of Package Should Be Maintained For Every User

When a package is called by multiple users each a copy of each user is maintained in UGA and has it's own state.I want that only one copy of package should be maintained for every user.See the below package.

CREATE OR REPLACE PACKAGE MY_PKG IS
LV_MY_VAR NUMBER(10) := 10 ;
END MY_PKG ;

my requirement.

User1 logs in and executes below statements

BEGIN
DBMS_OUTPUT.PUT_LINE( MY_PKG.LV_MY_VAR ) ;
MY_PKG.LV_MY_VAR := 15 ;
DBMS_OUTPUT.PUT_LINE( MY_PKG.LV_MY_VAR ) ;
END ;

User2 logs in and executes below statements:

BEGIN
DBMS_OUTPUT.PUT_LINE( MY_PKG.LV_MY_VAR ) ;
MY_PKG.LV_MY_VAR := 20 ;
DBMS_OUTPUT.PUT_LINE( MY_PKG.LV_MY_VAR ) ;
END ;

in general scenario output will be

10
15

10
20

my requirement
10
15

15 Value changed by User1 is retained.
20