long loading site

site rd4global.com/

on my site about 1000 objects
on average, every page loaded in 7-10 seconds
on VPS server - a little faster 6-8 sec
for my customer is very long

Statistics tables:
_osrs_property_field_opt_value - 9,639 lines
_osrs_watermark - 9,179 lines
_osrs_urls 3,573 lines
_osrs_property_field_value - 3,031 lines
_osrs_property_listing_layout - 2,224 lines
_osrs_property_categories - 992 lines
_osrs_properties - 989 lines

size of BD ~ 16 mb
turn off ALL unused expansion
off the counters, online consultant too special not help
caching do not want to customize

Hi Dmitry,
You can check your site loading speed from here: tools.pingdom.com/fpt/#!/b7eXLJ/rd4global.com . It comes from css, js, back links in your site. You can check the result to reduce the css and js files in your site.
Thanks
Dam