How do I analyze survey data with a stratified design with certainty PSUs?

This example is taken from Lehtonen and Pahkinen’s
Practical Methods for Design and
Analysis of Complex Surveys.

page 60 Table 2.8 Estimates under a PPSSYS
design (n = 8); the Province’91 population.
NOTE: The certainty PSU (the first line of the data) was entered twice
and the weight was changed from 1 to .5 for each observation. This is
necessary because you need to have two observations in each strata.

data page60;
input id str clu wt hou85 ue91 lab91;
fpc = 32;
datalines;
1 2 1 0.5 26881 4123 33786
2 2 1 0.5 26881 4123 33786
3 1 10 1.004 9230 1623 13727
4 1 4 1.893 4896 760 5919
5 1 7 2.173 4264 767 5823
6 1 32 2.971 3119 568 4011
7 1 26 4.762 1946 331 2543
8 1 18 6.335 1463 187 1448
9 1 13 13.730 675 129 927
;
run;

proc sort data = page60;
by str;
run;

proc surveymeans data = page60 sum std;
weight wt;
strata str;
cluster clu;
var ue91;
run;

The SURVEYMEANS Procedure

            Data Summary

Number of Strata                   2
Number of Clusters                 8
Number of Observations             9
Sum of Weights                33.868

               Statistics

Variable             Sum         Std Dev
----------------------------------------
ue91               15077      521.121241
----------------------------------------