There're 98 NDD and 742 ADD.
There're about 1869 SBST single deckers in Singapore
Here's the breakdown of my calculation of single deckers..
SBS 31 L - SBS 999 U --> 968 units. 1 Scania burnt
SBS 3572 Y - SBS 3922 X --> 349 units. 2 Scanias MIA/burnt
SBS 1688 K, SBS 2888 T, SBS 2988 M, SBS 2989 K --> 4 units
SBS 1696 L - SBS 1895 D --> 199 units. 1 Mk2 burnt
SBS 1896 B - SBS 1999 M, SBS 2593 T - SBS 2838 M --> 349 units.
1 strider burnt