I pored through the forum and search and did not find this.
So I did it the old fashioned way.
As far as I can tell these are all the Planetary Improvement <AbilityType> Numbers:
0 Economy Bonus
1 Weapons Bonus
2 Defense Bonus
3 Speed Bonus
4 Morale Bonus
5 Population Growth Bonus
6 Social Production Bonus
7 Military Production Bonus
8 Research Bonus
9 Influence Bonus
10 Trade Bonus
11 Diplomacy Bonus
12 Hit Points Bonus
13 Repair Bonus
14 Sensor Bonus (in sectors I think, not % like the rest of them)
15 Espionage Bonus
16 Soldering Bonus
17 Purchase Now Bonus
18 Planet Quality Bonus
19 Trade Routes Bonus
20 Crime Bonus
21 Cabinet Bonus
22 Range Bonus
23 Luck Bonus
24 Courage Bonus
25 Creativity Bonus
26 Government Bonus
27 Loyalty Bonus
28 Logistics Bonus
29 Miniaturization Bonus
30 Home Planet Quality Bonus
31 Colonize Heavy Gravity Bonus
32 Colonize Aquatic Bonus
33 Colonize Toxic Bonus
34 Colonize Barren Bonus
35 Colonize Radioactive Bonus
36 War Profiteering Bonus
37 Persistent Trade Routes Bonus
At 38-40 my game simply crashed, so I assumed there were no more after 37.
I think these are Civ-Wide abilities because some of them are also covered with other tags, such as:
<ManufactureBonus>0</ManufactureBonus>
<MoraleBonus>0</MoraleBonus>
<EconomicBonus>0</EconomicBonus>
<PrestigeBonus>0</PrestigeBonus>
<PlanetaryDefenseBonus>0</PlanetaryDefenseBonus>
<PlanetaryQualityBonus>0</PlanetaryQualityBonus>
<StarshipQualityBonus>0</StarshipQualityBonus>
And I think the tags above are planet exclusive. I am not sure though.